Crossword Genius

Quick turn round in vehicles (5)

Ross

I believe the answer is:

smart

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

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for smart that I've seen before include "Chic - hurt" , "Intelligent; clean, tidy" , "Trams (anag.)" , "Alick" , "Well-dressed" .)

I've seen this clue in The Globe and Mail.
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