island group south of Cuba (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
cayman
(Other definitions for cayman that I've seen before include "Fearsome creature" , "Alligator-like reptile; Amy can (anagram)" , "Member of crocodile family" , "Crocodilian animal" , "Alligator - island" .)