Short car journey goes quickly on the return (4)

I believe the answer is:

spin

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'short car' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for spin that I've seen before include "what some bowlers hope for" , "Turn round quickly" , "Political treatment by "doctor"" , "present information favourably" , "Fish" .)

I've seen this clue in The Times.

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