Food from special American welcome (5)
I believe the answer is:
sushi
'food' is the definition.
(sushi is a kind of food)
'special american welcome' is the wordplay.
'special' becomes 's' (common abbreviation as in Special Air Service).
'american' becomes 'us' (abbreviation for United States).
'welcome' becomes 'hi' (I've seen this in other clues).
's'+'us'+'hi'='SUSHI'
'from' acts as a link.
(Other definitions for sushi that I've seen before include "Japanese rice and raw fish dish" , "Raw fish dishes" , "Asian food" , "put away in Japan" , "Japanese vinegared rice dish" .)