Studies noted duets, possibly (6)
I believe the answer is:
etudes
'studies' is the definition.
(I have seen 'Musical studies ' mean 'etudes' so perhaps 'studies' could also mean 'etudes')
'noted duets possibly' is the wordplay.
'noted' becomes 'e' (I can't explain this - if you can you should believe this answer much more).
'possibly' is an anagram indicator.
'duets' with letters rearranged gives 'tudes'.
'e'+'tudes'='ETUDES'
Can you help me to learn more?
(Other definitions for etudes that I've seen before include "Short compositions for solo instruments" , "Musical exercises (Fr.)" , "Short pieces for solo instruments to show talent" , "Set due in short musical compositions" , "Musical studies" .)