Drink beer on me, possibly after end of poll (6,5)
I believe the answer is:
bitter lemon
'after end of poll' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'drink beer on me' is the wordplay.
'drink' becomes 'bitter' (bitter is a kind of drink).
'beer on me' becomes 'lemon' (I can't explain this - if you can you should believe this answer much more).
'bitter'+'lemon'='BITTER LEMON'
'possibly' is the link.
Can you help me to learn more?
(Other definitions for bitter lemon that I've seen before include "Soft citrus drink" , "Tart soft drink" .)