Posh actor played game of dice in US (9)

I believe the answer is:

crapshoot

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'game of dice in us' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'posh actor played' is the wordplay.
'played' indicates anagramming the letters (letters playing around).
'posh'+'actor'='poshactor'
'poshactor' anagrammed gives 'CRAPSHOOT'.

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