Ghana's greatest cross-country runner (5)

I believe the answer is:

volta

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This clue might be a double definition.

'ghana's' is the first definition.
Both the definition and answer are singular nouns.
Maybe you can see a link between them that I don't see?

'greatest cross-country runner' is the second definition.
The definition suggests a singular noun which matches the answer.

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I've seen this clue in the Evening Standard.

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