Huss cooked with one fish dish (5)
I believe the answer is:
sushi
'fish dish' is the definition.
(I've seen this before)
'huss cooked with one' is the wordplay.
'cooked with' is an anagram indicator.
'one' becomes 'i' (Roman numeral).
'huss' anagrammed with 'i' can make 'SUSHI'.
(Other definitions for sushi that I've seen before include "rice dishes" , "Japanese food" , "fare from Japan" , "Cold rice dish, often with raw fish" , "Rice, seafood cuisine" .)