Work or play (3)

I believe the answer is:

act

I believe this is a double definition.

'work' is the first definition.
(synonyms)

'play' is the second definition.
(synonyms)

'or' is the link.

(Other definitions for act that I've seen before include "Perform theatrically" , "law passed" , "Play (a role)" , "Major division of play" , "Exploit" .)

I've seen this clue in the Evening Standard.

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