Ending, about to study church (7)
I believe the answer is:
cadence
'ending' 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 don't see?
'about to study church' is the wordplay.
'about' becomes 'ca' (abbreviation for 'circa').
'to study' becomes 'den' (term for a study or office).
'church' becomes 'CE' (abbreviation for Church of England).
'ca'+'den'+'ce'='CADENCE'
Can you help me to learn more?
(Other definitions for cadence that I've seen before include "Closing bars" , "Rhythm or beat" , "Final musical sequence" , "Close of a musical phrase" , "Rhythm of the voice" .)