Hawk or owl (6)
I believe the answer is:
raptor
'hawk or owl' is the definition.
(I know that hawk is a type of raptor)
This is the entire clue.
(Other definitions for raptor that I've seen before include "Hunter" , "Parrot (anag) - bird of prey" , "Eagle, hawk, falcon or owl - parrot (anag)" , "Harrier possibly" .)