Back of the head (7)
I believe the answer is:
occiput
'back of the head' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for occiput that I've seen before include "Head's back" , "bit of the bonce" , "back of one's head" , "Back part of the skull" , "Back of the head (anatomy)" .)