Performs in Cairo - not in Costa Rica (4)

I believe the answer is:

acts

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'performs' is the definition.
(acting is a kind of performing)

I don't understand the remainder of the clue.

(Other definitions for acts that I've seen before include "Performances" , "Theatrical deeds" , "performers for revue, say?" , "exerts influence" , "Cast in exploits" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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