Misbehave and take part in heightened drama? (3,2)
I believe the answer is:
act up
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' acts as a 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" .)