Work of works (5)
I believe the answer is:
opera
This could be a double definition.
'work of' is the first definition.
'opera' can be an answer for 'work' (musical work). I am not sure about the 'of' bit.
'works' is the second definition.
(I've seen this in another clue)
Can you help me to learn more?
(Other definitions for opera that I've seen before include "Macbeth, say" , "eg 'Aida'" , "Carmen, for instance" , "eg Otello" , "Fidelio for instance" .)