Dish from South America and Hawaii (5)
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I believe the answer is:
sushi
'dish' is the definition.
(sushi is a kind of dish)
'south america and hawaii' is the wordplay.
'south' becomes 's' (abbreviation).
'america' becomes 'US' (United States).
'and' means one lot of letters go next to another.
'hawaii' becomes 'HI' (US postal abbreviation).
's'+'us'+'hi'='SUSHI'
'from' is the link.
(Other definitions for sushi that I've seen before include "Japanese rice-based dish" , "Raw fish dishes" , "Exotic food" , "Food from Japan" , "oriental dish" .)