Wine from cold picnic baskets (8)
I believe the answer is:
champers
'wine' is the definition.
(I've seen this before)
'cold picnic baskets' is the wordplay.
'cold' becomes 'C' (eg on taps).
'picnic baskets' becomes 'hampers' (I've seen this in another clue).
'c'+'hampers'='CHAMPERS'
'from' acts as a link.
(Other definitions for champers that I've seen before include "Drink casually" , "something sparkling!" , "People putting their teeth in" , "Might they be extremely eager" , "People who eat" .)