Noted duet, possibly (by Chopin?) (5)
I believe the answer is:
etude
'by chopin?' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe there's a link between them I don't understand?
'noted duet' is the wordplay.
I cannot really see how this works, but
an anagram of 'duet' is 'etud' which is present in the answer.
A single letter 'e' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'possibly' acts as a link.
Can you help me to learn more?
(Other definitions for etude that I've seen before include "A short musical exercise" , "Noted composition" , "Chopin study" , "bit of practice" , "Short piece of music for solo instrument" .)