Drama set to music (5)
I believe the answer is:
opera
'drama set to music' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for opera that I've seen before include "Comic or grand entertainment?" , "works in Latin" , "Aida, for example" , "eg Peter Grimes" , "Musical in which all the words are sung" .)