Such games will never be played out (6)

I believe the answer is:

indoor

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'out' is the definition.
Both the definition and answer are adjectives. Perhaps you can see an association between them that I can't see?

I cannot understand how the remainder of the clue works.

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(Other definitions for indoor that I've seen before include "not alfresco" , "These sports are roofed" , "Situated under cover" , "Practised inside" , "away from the other elements" .)

I've seen this clue in The Globe and Mail.

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