Bird caught animal's head in jaws (5)
I believe the answer is:
macaw
'bird' is the definition.
(type of parrot)
'caught animal's head in jaws' is the wordplay.
'head' indicates taking the first letters.
'in' is an insertion indicator.
'jaws' becomes 'maw' (I've seen this before).
The first letters of 'caught animal' is 'ca'.
'ca' inserted within 'maw' is 'MACAW'.
(Other definitions for macaw that I've seen before include "Tropical bird" , "Largest parrot" , "Chattering cousin of a cockatoo" , "Type of parrot" , "Large bright parrot" .)