Wine provided by good parties (6)
I believe the answer is:
graves
'wine' is the definition.
(left bank subregion of Bordeaux in France)
'by good parties' is the wordplay.
'by' means one lot of letters go next to another.
'good' becomes 'g' (abbreviation).
'parties' becomes 'raves' (**).
'g' put next to 'raves' is 'GRAVES'.
'provided' is the link.
(Other definitions for graves that I've seen before include "Robert - - (war poet)" , "Burial places - French wine" , "Red or white wine" , "White wine - in cemetery" , "Wine - English poet - tombs" .)