Crossword Genius

Motivation to be a motorist (5)

Ross

I believe the answer is:

drive

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

I cannot understand how the remainder of the clue works.

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(Other definitions for drive that I've seen before include "Car journey; urge" , "Ambition - steer" , "gear" , "offensive" , "first shot" .)

I've seen this clue in The Daily Express.
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