Farmed fish (5)
(Other definitions for salmon that I've seen before include "Food fish; pink shade" , "'No alms, oddly, for this fish (6)'" , "Pale pink colour" , "Edible fish" , "Game fish" .)
(Other definitions for trout that I've seen before include "Unattractive old woman" , "unpleasant old woman" , "Food fish" , "Edible fish" , "Fish of salmon family" .)