Sound cover for some entertainment (6)
I believe the answer is:
masque
'entertainment' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for masque that I've seen before include "Dramatic entertainment popular in the 16th and 17th centuries" , "16th- or 17th-century drama" , "Early stage work" , "Ancient entertainment" , "Style of fancy dress event" .)