French word for a car test (3)

I believe the answer is:

mot

I believe this is a double definition.

'french word' is the first definition.
(I've seen this in other clues)

'a car test' is the second definition.

'for' is the link.

(Other definitions for mot that I've seen before include "type of test" , "Word in France, bon perhaps" , "witty remark" , "Wisecrack (for older cars!)" , "Witty words" .)

I've seen this clue in the Evening Standard.

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