An account that won't be overdrawn (9)
I believe the answer is:
novelette
'an account that won't be overdrawn' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?
This is all the clue.
Can you help me to learn more?
(Other definitions for novelette that I've seen before include "Short book of fiction" , "romance?" , "Short and light tale" , "Short story" , "Short work of fiction" .)