Part of pinball sports league (1.1.1) (1,1,1)

I believe the answer is:

n b a

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'league 1 1 1' is the definition.
I don't know anything about this answer so I can't tell whether this works.

'part of pinball sports' is the wordplay.
'part of' says the answer is hidden in the clue.
'N B A' can be found hidden inside 'pinball sports'.

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

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