Crossword Genius

Surprise performance (4)

Ross

I believe the answer is:

turn

I believe this is a double definition.

'surprise' is the first definition.
(thesaurus)

'performance' is the second definition.
(turn is a kind of performance)

(Other definitions for turn that I've seen before include "revolutionary act" , "change for Autumn" , "Go - short walk" , "Revolve; act" , "Spell" .)

I've seen this clue in The Times.
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