Region of France with a cross that became the Free French symbol in WWII (8)

I believe the answer is:

lorraine

(Other definitions for lorraine that I've seen before include "woman cross?" , "French region, cross" , "Region of NE France" , "Girl's name - Nancy's region" , "French sister province of Alsace" .)

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.