Note about covering musicians (7)
I believe the answer is:
players
'musicians' is the definition.
('player' can be a synonym of 'musician')
'note about covering' is the wordplay.
I cannot really understand how this works, but
'note' could be 'la' (I've seen this in other clues) and 'la' is present in the answer.
This explanation may well be incorrect...
(Other definitions for players that I've seen before include "Actors" , "cast" , "They participate in games" , "Musicians" , "Team members" .)