Athletic contest surprisingly not held outside Central America (9)

I believe the answer is:

decathlon

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'athletic contest' is the definition.
(decathlon is a kind of athletic contest)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for decathlon that I've seen before include "Series of events" , "Olympic athletics event" , "Athletic event" , "Athletic contest with ten different events" , "Event, or events" .)

I've seen this clue in The Hindu.

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