Bilbao's province (6)

I believe the answer is:

biscay

(Other definitions for biscay that I've seen before include "Atlantic bay between Spain and France" , "European bay" , "Bay of Western France and Northern Spain" , "UK shipping forecast area" , "Great Bay between France and Spain" .)

I've seen this clue in The Wall Street Journal.

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.