Meet in a revised morning session (7)
I believe the answer is:
matinee
'morning session' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'meet in a revised' is the wordplay.
'revised' indicates an anagram.
'meet'+'in'+'a'='meetina'
'meetina' with letters rearranged gives 'MATINEE'.
Can you help me to learn more?
(Other definitions for matinee that I've seen before include "in which players may appear?" , "Afternoon showing of play" , "theatre performance" , "After lunch, show" , "Daytime performance of play etc" .)