Turkey not in fashion? Get fish (5)
I believe the answer is:
trout
'fish' is the definition.
(trout is a kind of fish)
'turkey not in fashion?' is the wordplay.
'turkey' becomes 'tr' (I've seen this in other clues).
'not in fashion?' becomes 'out' (I've seen this before).
'tr'+'out'='TROUT'
'get' is the link.
(Other definitions for trout that I've seen before include "Irritating old person" , "Swimmer" , "Small salmonlike fish" , "one may be hooked" , "Tasty fish, brown or rainbow" .)