Lorraine's partner (6)
I believe the answer is:
alsace
'lorraine's partner' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for alsace that I've seen before include "Region in France, occasionally German" , "source of French wines" , "Region of France famous for white wine" , "Region of France, capital Strasbourg" , "Filled pastry" .)