Carnivore later let loose (5)
I believe the answer is:
ratel
'carnivore' is the definition.
(ratel is a kind of carnivore)
'later let loose' is the wordplay.
'let loose' indicates an anagram.
'later' with letters rearranged gives 'RATEL'.
(Other definitions for ratel that I've seen before include "Musteline mammal" , "Badger-like creature" , "Animal of Africa and India - alert (anag)" , "Honey badger" , "wild animal" .)