Chap entertains company, offering wine (5)
I believe the answer is:
macon
'wine' is the definition.
(macon is a kind of wine)
'chap entertains company' is the wordplay.
'chap' becomes 'man' (I've seen this before**).
'entertains' is an insertion indicator.
'company' becomes 'co' (abbreviation).
'man' enclosing 'co' is 'MACON'.
'offering' is the link.
(Other definitions for macon that I've seen before include "red" , "Variety of Burgundy" , "French wine region" , "Burgundian wine" , "Dry white Burgundy wine" .)