Covent Garden solo (4)
I believe the answer is:
aria
'covent garden solo' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for aria that I've seen before include "Operatic number" , "Musical performance" , "Song for solo voice from an oratorio, cantata etc" , "Operatic solo performance" , "Song such as "Your Tiny Hand is Frozen"" .)