Fish delicacy (3)
(Other definitions for sushi that I've seen before include "Fated" , "Japanese cold rice dish" , "Asian food" , "Cold rice dish, often with raw fish" , "fare from Japan" .)
'fish delicacy' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for roe that I've seen before include "Food from fish" , "Part of fish, sounds like go through water" , "Mass of fish eggs" , "Hoofed animal(s)" , "If hard, eggs" .)