A 'one-note' Dohnanyi piece (3)
I believe the answer is:
doh
'piece' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'a one-note dohnanyi' is the wordplay.
'a one note' becomes 'do' (musical note, as in do-re-mi).
'dohnanyi' becomes 'h' (I can't explain this - if you can you should believe this answer much more).
'do'+'h'='DOH'
Can you help me to learn more?
(Other definitions for doh that I've seen before include "Tonic (mus.)" , "annoyed expression" , "First and eighth note in tonic sol-fa" , "Silly me!" , "acknowledgment of stupidity" .)