Wine cartel punished (6)
I believe the answer is:
claret
'wine' is the definition.
(claret is a kind of wine)
'cartel punished' is the wordplay.
'punished' is an anagram indicator.
'cartel' anagrammed gives 'CLARET'.
(Other definitions for claret that I've seen before include "English word for red Bordeaux wine" , "Red Bourdeaux wine" , "Deep purplish colour" , "Red wine from southern France" , "Purplish-red - blood" .)