Party’s rejected a constituent for boozy tipples (4)
I believe the answer is:
'constituent for boozy tipples' is the definition.
I can't tell whether this definition defines the answer.
'party's rejected a' is the wordplay.
'party's' becomes 'dos' (do is a kind of party).
'rejected' says the letters should be written in reverse.
'dos' backwards is 'sod'.
Can you help me to learn more?
(Other definitions for soda that I've seen before include "Variety of pop" , "kind of water" , "Alkaline substance used in cleaning, drinks etc" , "Splash served with some spirits" , "Accompaniment to whisky" .)