Misbehave when the bill appears and get put out (3,2)

I believe the answer is:

act up

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'misbehave' is the definition.
(acting up is a kind of misbehaving)

I don't understand how the rest of the clue works.

(Other definitions for act up that I've seen before include "Behave badly, cause trouble - like thespian?" , "Behave like a brat" , "create fireworks display?" , "Give trouble, make a fuss" , "go wrong" .)

I've seen this clue in The Globe and Mail.

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