Trattoria seafood (8)
I believe the answer is:
calamari
'trattoria seafood' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for calamari that I've seen before include "Battered squid rings" , "seafood" , "Squid prepared as food" , "Mediterranean cooked squid" , "Mollusc" .)