Winter party cocktail? (8)
I believe the answer is:
snowball
'cocktail?' is the definition.
(I've seen this before)
'winter party' is the wordplay.
'winter' becomes 'snow' (I can't explain this - if you can you should believe this answer much more).
'party' becomes 'ball' (ball is a kind of party).
'snow'+'ball'='SNOWBALL'
Can you help me to learn more?
(Other definitions for snowball that I've seen before include "Cocktail; grow rapidly" , "Drink of advocaat and lemonade" , "Mushroom" , "It's thrown in winter fun (8)" , "A mixture of drugs" .)