Maybe mud found in English pie section (7)
I believe the answer is:
episode
'maybe mud' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'in english pie section' is the wordplay.
'in' is an insertion indicator.
'english' becomes 'e' (abbreviation).
'section' becomes 'sod' (I am not sure about this - if you are sure you should believe this answer much more).
'e'+'pie'='epie'
'epie' enclosing 'sod' is 'EPISODE'.
'found' is the link.
Can you help me to learn more?
(Other definitions for episode that I've seen before include "Incident in a story or part of a serial" , "One of a related series of events" , "One programme of a series" , "Instalment; event" , "One instalment of a series" .)