Gentleman returning with a fish or meat dish (7)
I believe the answer is:
rissole
'meat dish' is the definition.
(I've seen this before)
'gentleman returning with a fish' is the wordplay.
'gentleman' becomes 'sir' (a man may be addressed as sir).
'returning' says the letters should be written backwards.
'with' means one lot of letters go next to another.
'a fish' becomes 'sole' (sole is a kind of fish).
'sir' backwards is 'ris'.
'ris'+'sole'='RISSOLE'
'or' is the link.
(Other definitions for rissole that I've seen before include "Fried meat dish" , "Losers I find in the chopped meat dish" , "Lorises (anag)" , "Minced meat or fish deep fried in egg and breadcrumbs" , "Compressed meat and spices in breadcrumbs, fried" .)