Drink in picnic containers, carbonated? (8)
I believe the answer is:
champers
'drink' is the definition.
(informal term for champagne)
'picnic containers carbonated?' is the wordplay.
I cannot really understand how this works, but
'containers' could be 'hampers' (hamper is a kind of container) and 'hampers' is found within the answer.
A single letter 'c' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for champers that I've seen before include "Might they be extremely eager" , "Bubbly" , "Drink casually" , "Kind of sparkling wine (slang)" , "celebratory drink" .)