Different diamonds taken out of America (4)
I believe the answer is:
iced
'different' is the definition.
Both the answer and definition are adjectives. Perhaps there's an association between them I don't understand?
'diamonds taken out of america' is the wordplay.
'diamonds' becomes 'ice' (slang term for diamonds).
'taken out of america' becomes 'd' (I can't justify this - if you can you should give a lot more credence to this answer).
'ice'+'d'='ICED'
Can you help me to learn more?
(Other definitions for iced that I've seen before include "Dressed in a sweet coat" , "Took out" , "Frozen, chilled" , "Decorated (a cake)" , "Core; card; organ" .)