Fairy queen (7)
I believe the answer is:
titania
'fairy queen' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for titania that I've seen before include "in the D [DREAM] ..." , "asinine lover" , "Queen of the fairies - Uranus satellite" , "Bottom attracts me" , "Oberon's queen (MND)" .)