Gut pain with bad hooch quaffed by sons: they go from bar to bar! (11)
I believe the answer is:
chocoholics
'they go from bar to bar' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'gut pain with bad hooch quaffed by sons' is the wordplay.
'gut pain with' becomes 'colic' (I can't explain this - if you can you should believe this answer much more).
'bad' indicates anagramming the letters.
'quaffed by' is an insertion indicator (inserted letters are drunk or quaffed by others).
'sons' becomes 's'.
'hooch' with letters rearranged gives 'hocoh'.
'colic' enclosing 'hocoh' is 'chocoholic'.
'chocoholic'+'s'='CHOCOHOLICS'
Can you help me to learn more?
(Another definition for chocoholics that I've seen is " types addicted to what's in bars - and in their cups?".)