Greek character namely on date drunk wine (8)
I believe the answer is:
Here is my best explanation:
'wine' is the definition.
(Muscadet is an example)
'greek character namely on date drunk' is the subsidiary indication.
'greek character' becomes 'mu'.
'namely' becomes 'sc' (I've seen this in other clues).
'on' is a charade indicator (letters next to each other).
'drunk' indicates an anagram.
'date' with letters rearranged gives 'adet'.
(Other definitions for muscadet that I've seen before include "Dry French white wine", "A dry white wine", "White wine variety", "Dry white wine from the Loire valley" and "French dry white wine".)