Monk's shaven head (7)
I believe the answer is:
tonsure
'monk's shaven head' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tonsure that I've seen before include "Shearing ?" , "Part of a monk's head left bare by shaving" , "Close-shaved hairstyle" , "Haircut for a monk" , "Removal of locks" .)