[Galadriel55]

Alright, a few more hints for the remaining ones?

2. U: Pinnacle organ on the far side is a cause for quarrel.
"On the far side" indicates that the red letter is on the far half of the answer, and the straight clue is at the end. This is a less known name for a very well-known thing.

8. N: A king in reverse is an element mixed with itself.
"king" is the straight clue. What king can you think of that might be related to the stone theme?

10. T: By the sound of it, dying's son.
An augmentation to the clue: By the sound of it, dying's son is a god within.
Again, what sounds like "dying"? Find "dying", and you'll find the son.

14. G: Note riders exchange directions with reluctant riders.
Seriously, post the top three things that come to mind when you think of Tolkien "riders", and examples for reluctant riders. I am sure you'll have the right ones, and I'll tell you if you get them.