Dry plateau, west of the Andes — a mad estate car (anag) (7,6)

I believe the answer is:

atacama desert

(Other definitions for atacama desert that I've seen before include "barren landscape" , "Barren region of Chile" , "South American wasteland" , "S. American wilderness" , "Arid region in Chile" .)

I've seen this clue in The Guardian.

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