Music suitable for the children’s playground? (5)

I believe the answer is:

swing

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'music' is the definition.
(swing is a kind of music)

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

(Other definitions for swing that I've seen before include "Golfer may want to perfect this" , "Move like a pendulum" , "jazz music" , "Move back and forth" , "Jazz-like dance music" .)

I've seen this clue in the Evening Standard.

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