Copper bar from a Caribbean island (5)

I believe the answer is:

cuban

'from a caribbean island' is the definition.

'copper bar' is the wordplay.
'copper' becomes 'cu' (chemical symbol).
'bar' becomes 'ban' (I've seen this before**).
'cu'+'ban'='CUBAN'

(Other definitions for cuban that I've seen before include "One from Havana" , "Like Fidel Castro" , "Relating to Castro's isle" , "Citizen of Castro's country" , "Republican" .)

I've seen this clue in The Times.

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