Desert in which the Marathon des Sables takes place (6)

I believe the answer is:

sahara

(Other definitions for sahara that I've seen before include "Hottest desert" , "Uncultivated region of north Africa" , "About 3,500,000 square miles of Africa" , "Great desert in N Africa" , "World's largest desert" .)

I've seen this clue in The Times and The Sunday Times.

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.