Son with us greeting tasty Asian dish (5)
I believe the answer is:
sushi
'asian dish' is the definition.
(I've seen this before)
'son with us greeting' is the wordplay.
'son' becomes 's'.
'with' means one lot of letters go next to another.
'greeting' becomes 'hi' (hi is a kind of greeting).
's'+'us'+'hi'='SUSHI'
'tasty' acts as a link.
This may not be correct. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for sushi that I've seen before include "cold food" , "Japanese rice-based dish" , "Japanese food" , "Japanese cold rice dish" , "Asian food" .)