"Toreador Song" composer (5)
I believe the answer is:
bizet
'toreador song composer' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bizet that I've seen before include "Georges __; French composer" , "French composer of 'Carmen'" , "Composer of the opera Carmen, d. 1875" , "French opera composer, d. 1875" .)