Game pair got higher (3-2)

I believe the answer is:

two-up

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'game' is the definition.
Both the definition and answer are singular nouns.
Maybe you can see an association between them that I don't see?

'pair got higher' is the wordplay.
'pair' becomes 'two' (a pair means two of something).
'got' means one lot of letters go next to another.
'higher' becomes 'up'.
'two'+'up'='TWO-UP'

Can you help me to learn more?

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

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