Trifle son removed from spread (4)

I believe the answer is:

play

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'trifle' is the definition.
(thesaurus)

I don't understand the remainder of the clue.

(Other definitions for play that I've seen before include "Theatrical production" , "Have fun -- theatrical work" , "Theatre production" , "Participate in games or sport" , "Drama; engage in games" .)

I've seen this clue in The Independent.

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