9 is more likely to be Old Forest, although I'm not convinced that 'fo' can be 'four'.

Well maybe I'm not very good at cryptic clues. ^_^ But you guessed it, so maybe I actually am?

Three to go. Number 2 appears in Book 4, numbers 11 & 13 appear in Book 1 (and in fact in adjacent chapters).

hS

Could "M" be the "Man in the Moon?"

11. Man in the Moon?

Edit: Whoops! Cross-post.

Yes to both of you. :D Tilion is of course best known for stalking Arien so much that he scorched the Moon on one side.

Two to go!

hS

Could 2 be Undertowers, if the Appendices count?

Not Undertowers - though you're actually half right.

hS

Is 13 (Gandalf's) LETTER? (Kept by Barliman, who forgot about it).

What is the evil bit, though? Do we need a synonym to find that? Epistle?

And apparently there's an UNDERGATE in Shelob's Lair.

Both correct! 'Letter' is a nasty little clue because there's no actual anagram involved (I think you got it - what's scrambled in an anagram is letters). The Undergate (which Sam tries to follow the Orcs to) is a tricky one because barely anyone remembers it exists - but there's not many words starting with U! (Umbar was the obvious one, but the Corsairs are in there, so.)

Well done! Over to you, Pervinca.

hS

Great puzzle, Huinesoron! 'Letters' is a clever cryptic clue. Should have guessed, because it sort of said anagram twice, but I didn't.

I'll post one shortly. I have a couple ready-made on my laptop.

Here you go ...
 

1. Me, subjectively, plus him ... for him .... (Well, in a roundabout sort of way).
2. The prairies!
3. It’s Undomiel’s monument, with a slight modification.
4. Tear demon, causing dental loss, left all around the refuge.
5. Retreat a step too far, to place of near-immolation? It’s just a number.
6. Answer this hider of gold.
7. Such a self-satisfied villain. Barely perturbed!

#7: smug, barely perturbed, could be SMAUG.

#6: I want to suggest one of the dragons with golden hides, which would be Smaug again or GLAURUNG.

hS

1. Me, subjectively, plus him ... for him .... (Well, in a roundabout sort of way).
2. The prairies!
3. It’s Undomiel’s monument, with a slight modification.
4. Tear demon, causing dental loss, left all around the refuge.
5. Retreat a step too far, to place of near-immolation? It’s just a number.
6. Answer this hider of gold.
SMAUG: Such a self-satisfied villain. Barely perturbed!

Yes: A plus SMUG, barely perturbed, = Smaug.

Glaurung is incorrect, though. Furthermore, 6 is not a dragon.

I wrote this puzzle quite a while ago, then Nerwen posted a puzzle with a similar Smaug clue in it, so I saved it for a while.

Autocorrect excelled itself there. It started as 22nd

If 6. is not a dragon, could it be Gollum? He hides a golden ring and wants a riddle answered?

It's not Gollum, but you're in the right part of the right book. And you've interpreted 'answer' pretty much correctly.

I did wonder why Imrahil was the Wind Prince. I was thinking of Dol Amroth sea breezes as well as those of the posterial category.

So is it Bilbo for the same reasons?

hS

No. :D

The gold in question is not the Ring.

And ...

'Answer' is not a verb here.

... is it an egg?

Yes!
 

1. Me, subjectively, plus him ... for him .... (Well, in a roundabout sort of way).
2. The prairies!
3. It’s Undomiel’s monument, with a slight modification.
4. Tear demon, causing dental loss, left all around the refuge.
5. Retreat a step too far, to place of near-immolation? It’s just a number.
EGG: Answer this hider of gold.
SMAUG: Such a self-satisfied villain. Barely perturbed!

'A box without hinges, key or lid
Yet golden treasure inside is hid.'

Is the password Riddles?

Good idea, but no.

The clues should get easier if you work out what the theme is, though.

The theme is pretty easy ....

Is 4 Rivendell. Tear could be rive and demon could be devil and I hoped v might be a dental fricative but I can’t dispose of the I but left might be extra l, and it certainly is a refuge

1. Me, subjectively, plus him ... for him .... (Well, in a roundabout sort of way).
2. The prairies!
3. It’s Undomiel’s monument, with a slight modification.
RIVENDELL: Tear demon, causing dental loss, left all around the refuge.
5. Retreat a step too far, to place of near-immolation? It’s just a number.
EGG: Answer this hider of gold.
SMAUG: Such a self-satisfied villain. Barely perturbed!

Good ideas, and the correct end result. It's REND + DEVIL, minus one of the D's for 'dental loss.' And 'all around' to scramble it, of course.

For 2, you might want to consider a well-loved children's author.

... is it WILDERLAND, being the lands that Laura [s]Ingold[/s] Ingalls Wilder wrote about?

General theme is looking to be The Hobbit, but I've not got a guess at the password yet.

I keep coming back to #5 being a description of Gollum's death, and therefore pointing at 'THE ONE', but the 'near-' throws that off.

hS

1. Me, subjectively, plus him ... for him .... (Well, in a roundabout sort of way).
WILDERLAND: The prairies!
3. It’s Undomiel’s monument, with a slight modification.
RIVENDELL: Tear demon, causing dental loss, left all around the refuge.
5. Retreat a step too far, to place of near-immolation? It’s just a number.
EGG: Answer this hider of gold.
SMAUG: Such a self-satisfied villain. Barely perturbed!

THEME: 'THE HOBBIT.'

It isn't Gollum's full or even partial combustion I'm looking for. For one thing, it's in the wrong book.

What does an [/s] font look like, and why have you put it around Ingold?

Oops... [s] would be strikethrough if this were HTML (and if the brackets were pointy). I tried to make a Tolkien joke but flubbed the delivery (story of my life...!).

hS

Clue 1 will be hard until you get the password.

Solve clue 5 and the password will be easy to guess.

When retreating a step too far, remember that in making themed passwords we sometimes have to compromise with how the letters are situated to make the password work.

Is the Password "DWARVES?"

D: Me, subjectively, plus him ... for him .... (Well, in a roundabout sort of way).
WILDERLAND: The prairies!
A: It’s Undomiel’s monument, with a slight modification.
RIVENDELL: Tear demon, causing dental loss, left all around the refuge.
-V: Retreat a step too far, to place of near-immolation? It’s just a number.
EGG: Answer this hider of gold.
SMAUG: Such a self-satisfied villain. Barely perturbed!

THEME: 'THE HOBBIT'

Indeed it is!

Thinking aloud, in case it helps someone else:
#5 is meant to be read in reverse, I think? And "near-immolation" would refer to one of the incidents where Smaug *nearly* got Bilbo or the others. But I can't make sense of the last part.

Going by the letters and the "just a number", does FIVE also happen to be a place? Battle of 5 Armies? Anything?

It's FIVE, reading backwards, yes, and it's a place (or perhaps one should say five places) ... but it's not the battle of the five armies, and it's nothing to do with Smaug (other than being in the same book and having happened on the way to visit him).

Clue: I could hear (in my imagination) a group called The Hobbitons (I have their CD) singing where the near-immolation took place, as I wrote the clue.

Oh!

FIF-TEEN BIRDS IN FIVE FIR TREES!

hS

D: Me, subjectively, plus him ... for him .... (Well, in a roundabout sort of way).
WILDERLAND: The prairies!
A: It’s Undomiel’s monument, with a slight modification.
RIVENDELL: Tear demon, causing dental loss, left all around the refuge.
EVIF (FIRTREES): Retreat a step too far, to place of near-immolation? It’s just a number.
EGG: Answer this hider of gold.
SMAUG: Such a self-satisfied villain. Barely perturbed!

THEME: 'THE HOBBIT'

Yes. 'Just a number' because we are only using the number to get the letter (the answer would be retreating *really* far otherwise!)

Two to go!

By the way, one of the 'hims' of clue one could be seen as a desperate man ….

A is for Arkenstone slightly modified would be arwenstone, a sone can be a monument

Good one, Mith!