Diva's delivery (4)
I believe the answer is:
aria
'diva's delivery' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for aria that I've seen before include "Operatic part" , "Type of song" , "Operatic solo, duet, etc" , "Song for solo voice from an oratorio, cantata etc" , "complex song" .)