Company, commonly the man's company, right? (6)
I believe the answer is:
escort
'company' is the definition.
(I've seen this before)
'commonly the man's company right?' is the wordplay.
'commonly the man's' becomes 'es' (cockney he's - with a dropped h).
'company' becomes 'co' (abbreviation).
'right?' becomes 'rt'.
'es'+'co'+'rt'='ESCORT'
(Other definitions for escort that I've seen before include "Usher" , "Person who accompanies or guards another" , "Armed guards" , "One who accompanies another" , "Accompany - Ford model" .)