Dramatic utterance of new ideas (5)
I believe the answer is:
aside
'dramatic utterance' 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?
'new ideas' is the wordplay.
'new' indicates anagramming the letters.
'ideas' anagrammed gives 'ASIDE'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for aside that I've seen before include "In reserve -- confidential remark" , "Separately" , "Words spoken apart in an undertone" , "Whispered comment" , "Line spoken to the audience of a play" .)