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 am not sure about this - if you are sure you should believe this answer much more).
'possibly' indicates anagramming the letters.
'duets' is an anagram of '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" .)