Variety star wanting covers for piece of music (7)
I believe the answer is:
arietta
'piece of music' is the definition.
(arietta is a kind of piece of music)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for arietta that I've seen before include "number from opera" , "Short operatic song" , "Little song" , "Short operatic number" , "Little aria" .)