Boy mentions game? (9)

I believe the answer is:

simonsays

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'game?' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'boy mentions' is the wordplay.
'boy' becomes 'simon' ().
'mentions' becomes 'says' (I've seen this in another clue).
'simon'+'says'='SIMONSAYS'

Can you help me to learn more?

I've seen this clue in The Irish Times.

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