Drink spilling over, linked together with fights -- thanks to this?
I believe the answer is:
pub-crawling
'spilling over linked together with fights thanks to this?' is the definition.
The definition suggests a singular noun but the answer is not.
'drink' is the wordplay.
I cannot quite see how this works, but
'drink' could be 'pubcrawl' (pub-crawling is a kind of drinking) and 'pubcrawl' is found in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for pub-crawling that I've seen before include "Touring several hostelries" , "Engaging in local tour" .)