Misbehave and take part in heightened drama? (3,2)
I believe the answer is:
act up
I believe this clue is a double definition.
'misbehave' is the first definition.
(acting up is a kind of misbehaving)
'take part in heightened drama?' is the second definition.
(I've seen this before)
'and' is the link.
(Other definitions for act up that I've seen before include "Behave badly, cause trouble - like thespian?" , "Informally, behave badly or cause trouble" , "Mess about" , "take part in heightened drama?" , "go wrong" .)