Crossword Genius

Behave badly in aerobatic display? (3,2)

Ross

I believe the answer is:

act up

I'm a little stuck... Click here to teach me more about this clue!

'behave badly' is the definition.
(acting up is a kind of behaving badly)

'aerobatic display?' is the wordplay.
I cannot really understand how this works, but
'display?' could be 'act' (display is a kind of act) and 'act' is found in the answer.
The remaining letters 'up' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

'in' acts as a link.

Can you help me to learn more?

(Other definitions for act up that I've seen before include "Give trouble, make a fuss" , "malfunction" , "take part in heightened drama?" , "Mess about" , "create fireworks display?" .)

I've seen this clue in The Telegraph.
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