Young animal and an islander (5)
I believe the answer is:
cuban
'islander' is the definition.
(I've seen this before)
'young animal and an' is the wordplay.
'young animal' becomes 'cub' (eg a young bear).
'and' is a charade indicator (letters next to each other).
'cub'+'an'='CUBAN'
(Other definitions for cuban that I've seen before include "Like Fidel Castro" , "Nationality of citizen of Havana" , "sort of heel" , "Caribbean" , "Kind of high quality cigar" .)