Drink and dine about to cause commotion (6)
I believe the answer is:
rumpus
'commotion' is the definition.
(I know that commotion can be written as rumpus)
'drink and dine about' is the wordplay.
'drink' becomes 'rum' (rum is a kind of drink).
'and' is a charade indicator (letters next to each other).
'dine' becomes 'sup' (synonyms).
'about' says the letters should be written backwards.
'sup' back-to-front is 'pus'.
'rum'+'pus'='RUMPUS'
'to cause' acts as a link.
(Other definitions for rumpus that I've seen before include "To-do" , "Noisy, disruptive commotion" , "Noisy disturbance" , "Row" , "Noisy brawl" .)