Piece sung by Jessye Norman (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
aria
(Other definitions for aria that I've seen before include "Air in an opera" , "Operatic solo, duet, etc" , "Elaborate accompanied song for solo voice" , "part of opera, maybe" , "Song, one from 'West Side Story' needing no introduction" .)