"Tosca" or "Turandot"
I believe the answer is:
opera
'tosca or turandot' is the definition.
(I know that Tosca is a Opera)
This is the entire clue.
(Other definitions for opera that I've seen before include "Eg, Il trovatore" , "Musical dramatic work" , "Musical stage work" , "works in Latin" , "Dramatic genre" .)