Bird of prey mutilated parrot (6)
I believe the answer is:
raptor
'bird of prey' is the definition.
(synonyms)
'mutilated parrot' is the wordplay.
'mutilated' indicates anagramming the letters.
'parrot' with letters rearranged gives 'RAPTOR'.
(Other definitions for raptor that I've seen before include "Eagle, hawk, falcon or owl - parrot (anag)" , "Parrot (anag) - bird of prey" , "Hunter" , "Harrier possibly" .)