It may be said, note, for the ears of the audience (5)
I believe the answer is:
aside
'ears of the audience' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'it may be said note' is the wordplay.
'it may be' indicates anagramming the letters (I've seen this in other clues).
'note' becomes 'e' (musical note).
'said' is an anagram of 'asid'.
'asid'+'e'='ASIDE'
'for the' acts as a link.
Can you help me to learn more?
(Other definitions for aside that I've seen before include "Quiet words spoken" , "Aides (anag.)" , "Actor's line directed solely to audience" , "kept in reserve" , "secretly" .)