RIDERS, BLACK: Absence in brides met with initial resistance
(dementors)
OLD MAN WILLOW: Whiskerless traveller's joy at avoiding extremes of hosiery
(whomping willow)
WORMTONGUE Men grow out baffled at this louse's conversation
(wormtail)
LAZY LOB: Throw after the idle
(aragog)
INVISIBLE Unseen; hidden
(cloak vs ring)
NAMELESS ENEMY Reduced title for foe
(he who must not be named)
GALADRIEL'S MIRROR: This lass railed around her reflector
(pensieve)
You all figured it out! Sorry Hui for the no straight clues. I had no idea how to even start going about these so I just went with what Google managed to teach me.