French dry white wine (7)
'french dry white wine' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for chablis that I've seen before include "Drink" , "Town in north central France noted for white Burgundy wines" , "Classic white wine from Burgundy" , "French dry white wine" , "Dry white Burgundy" .)
(Other definitions for sancerre that I've seen before include "Light French white wine" , "Type of French white wine" .)