South American greeting tasty Asian dish (5)
I believe the answer is:
sushi
'asian dish' is the definition.
(I've seen this before)
'south american greeting' is the wordplay.
'south' becomes 'S' (synonyms).
'american' becomes 'us' (abbreviation for United States).
'greeting' becomes 'hi' (hi is a kind of greeting).
's'+'us'+'hi'='SUSHI'
'tasty' acts as a link.
This may not be right. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for sushi that I've seen before include "Japanese cuisine" , "Exotic food" , "Cold rice dish, often with raw fish" , "Rice, seafood cuisine" , "Oriental food" .)