Happenings during the performers’ entrances? (6-2)

I believe the answer is:

goings-on

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'happenings' is the definition.
(I have seen 'Suspicious happenings' mean 'goings-on' so perhaps 'happenings' could also mean 'goings-on')

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for goings-on that I've seen before include "Funny business" , "Hanky-panky" , "mischief" , "Activities, esp. dubious ones" , "Suspect events or behaviour" .)

I've seen this clue in the Evening Standard.

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