Drama in pieces, be involved (4,1,4)
I believe the answer is:
play a part
'be involved' is the definition.
(I've seen this in another clue)
'drama in pieces' is the wordplay.
'drama' becomes 'play' (synonyms).
'in pieces' becomes 'apart' (I've seen this before).
'play'+'apart'='PLAY A PART'
(Other definitions for play a part that I've seen before include "Contribute" , "Be instrumental (in an activity)" .)