Notes limited comment (7)
I believe the answer is:
descant
'comment' 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?
'notes limited' is the wordplay.
'notes' becomes 'de' (two musical notes).
'limited' becomes 'scant' (I've seen this in another clue).
'de'+'scant'='DESCANT'
Can you help me to learn more?
(Other definitions for descant that I've seen before include "Independent melody sung above a basic melody" , "Treble melody part" , "Ornamental melody added above a theme" , "Melody sung or played above a basic melody" , "Accompaniment added above a basic melody" .)