How actor was involved in solitary games (6,1,4)

I believe the answer is:

played a part

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'involved in solitary games' is the definition.
The answer and definition can be both to do with fundamental existence as well as being past participle verbs.
Perhaps you can see an association between them that I can't see?

I don't understand the rest of the clue.

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

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