Late, in error (4)
I believe the answer is:
tale
'late in error' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'late in error' is the wordplay.
'in error' indicates anagramming the letters.
'late' with letters rearranged gives 'TALE'.
Can you help me to learn more?
(Other definitions for tale that I've seen before include "A story, perhaps out of school" , "Late with a story" , "'Story, narrative (4)'" , "An account of incidents or events" , "Anecdotal narrative" .)