TOL ERESSEA: Here, a biblical fellow returns, to meet an archaic palindrome and a sibilant ocean.
HALBARAD: Half German article and liquid marketing. For him.
ERECH: Place of mirth ... but it's not unmixed.
RADBUG: Brag - dubiously, at first, you hear - before chaos ensues to expose him.
EAGLES: Seasoned sailors have more than one of these. But be that as it may, it's mangled to reveal these majestic creatures!
TEARS: Not all of these are evil.
UMBAR: Does one hesitate to suggest a pub here?
ROSE: She's inflamed - and troubled.
N: One must dress, groom, prepare? - put nails in order, certainly - for them.
OSGILIATH: Is David's foe around here?
FORLONG: Beat a Weasley? He's there - but discombobulated.
TOOKS: Group of sheaves slightly disturbed by - or rather for - the first ones to kill.
HAVENS: They're beardless and bewildered.
ELANOR: A role reversed; an article swallowed; a girl revealed.
KNIGHTS: Merry and Pippin, in white satin? (For thus it sounds, in song).
IORLAS: A painter's choice - Rembrandt's, initially - and Goya's, finally - mingles to reveal him.
N: See this fearsome thing return, endlessly crazy, to endlessly deceive.
GILDOR: Aged apparatus collapses to reveal him.
It isn't the article that's German. It's the word HALF.
So: HALB + A + R + AD(VERTISEMENT).
P and B are PLOSIVES
D and T are DENTAL PLOSIVES
F and V (and various other sounds) are FRICATIVES
... but L and R are LIQUIDS.
The remaining clue is my favourite. The 'them' is something there are three specifically reported sets of in ROTK, but no reported sets of in FOTR or TTT.