Largest hot desert in the world (6)

I believe the answer is:

sahara

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

I've seen this clue in The New York Times, the Universal and the USA Today.

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