Company business comes before a drink (5)
I believe the answer is:
cocoa
'drink' is the definition.
(cocoa is a kind of drink)
'company business comes before a' is the wordplay.
'company' becomes 'co' (abbreviation).
'business' becomes 'co' (short for company).
'comes before' is a charade indicator (letters next to each other).
'co'+'co'+'a'='COCOA'
(Other definitions for cocoa that I've seen before include "Hot chocolate drink" , "Late-night drink" , "Warming bedtime drink" , "Kind of chocolate drink" , "Popular chocolate drink" .)