Where it's neighbourly to have a drink (5)
I believe the answer is:
local
'where it's neighbourly to have a drink' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
This is all the clue.
Can you help me to learn more?
(Other definitions for local that I've seen before include "(Pub) of the district" , "Public house - not far away" , "Restricted number" , "Hostelry" , "Village inn" .)