Fumes from a car engine (7)

I believe the answer is:

exhaust

(Other definitions for exhaust that I've seen before include "Devitalize, drain of energy" , "Completely tire out" , "Tire out - waste gases from engine" , "Car part for carrying away gases - would make you tired" , "Gases ejected from an engine" .)

I've seen this clue in The Guardian.

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