What a bouncer will do, shortly (5)
I believe the answer is:
pitch
'do shortly' 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?
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for pitch that I've seen before include "Throw or fall headlong" , "Scene of game (don't touch it!)" , "perfect for some players" , "Area for games" , "Degree of intensity" .)