"Otello," for one (5)
I believe the answer is:
opera
'otello for one' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for opera that I've seen before include "Patience, for example" , "Fidelio for instance" , "10 [NORMA], for example" , "Eg, Il trovatore" , "Eg, The Magic Flute" .)