Sport played with rackets, second set aside (6)

I believe the answer is:

squash

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'sport' is the definition.
(I know that squash is a type of racket sport)

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

Can you help me to learn more?

(Other definitions for squash that I've seen before include "jam" , "Suppress - game" , "Drink and racket game" , "Suppress - fruit drink" , "Court game - marrow-like plant" .)

I've seen this clue in the Sydney Morning Herald.

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