Arturo —, conductor (9)
I believe the answer is:
toscanini
This clue is a double definition.
'arturo' is the first definition.
(Arturo Toscanini, the Italian conductor)
'conductor' is the second definition.
(Arturo Toscanini)
(Other definitions for toscanini that I've seen before include "Old conductor" , "He conducted" , "Arturo --, Italian conductor" , "Maestro" , "Virtuoso conductor" .)