Crossword Genius

Car part - tyre for Ford? (7)

Ross

I believe the answer is:

exhaust

'car part' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

(Other definitions for exhaust that I've seen before include "Car part for carrying away gases - would make you tired" , "Pipe that carries engine fumes away" , "lower part of estate?" , "Sap - piped emission" , "Tube carrying off fumes from car engine" .)

I've seen this clue in The Independent.
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