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Extend country club when no options are left (4,6)

Ross

I believe the answer is:

last resort

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'left' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps you can see an association between them that I can't see?

I can't explain the remainder of the clue.

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(Other definitions for last resort that I've seen before include "when everything else has failed?" , "Final expedient" , "When all else fails, try this" .)

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