Cousin of a croc (5)
I believe the answer is:
gator
'cousin of a croc' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for gator that I've seen before include "beast?" , "one snaps in America" , "dangerous reptile shortly" , "Crocodilian (informal)" , "Informal American term for semi-aquatic reptile" .)