Fish and wine perhaps a bit off (9)
I believe the answer is:
whitebait
'fish' is the definition.
(whitebait is a kind of fish)
'wine perhaps a bit off' is the wordplay.
'wine perhaps' becomes 'white' (white wine).
'off' is an anagram indicator.
'a'+'bit'='abit'
'abit' is an anagram of 'bait'.
'white'+'bait'='WHITEBAIT'
'and' acts as a link.
(Other definitions for whitebait that I've seen before include "Small fried fish" , "Small fry as food" , "Small silvery fish, the fry of herring" , "Young of herrings" , "Fish eaten in quantity" .)