Original place for holding races every four years (7)

I believe the answer is:

olympia

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'original place' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Maybe they are linked in a way I don't understand?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for olympia that I've seen before include "plain in Greece" , "Scene of the original games" , "Old Greek city (games)" , "A place to exhibit" , "venue for godly sports" .)

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

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