Behave badly in a court — revolting (3,2)
I believe the answer is:
act up
'behave badly' is the definition.
(act up can mean to misbehave)
'a court revolting' is the wordplay.
'court' becomes 'ct' (abbreviation used in road names).
'revolting' becomes 'up' (rising up or revolting).
'a'+'ct'+'up'='ACT UP'
'in' acts as a link.
(Other definitions for act up that I've seen before include "Give trouble, make a fuss" , "Behave like a brat" , "Mess about" , "create fireworks display?" , "malfunction" .)