Type of home insurance makes you happy? (8)
I believe the answer is:
contents
'type' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for contents that I've seen before include "List of what's included" , "What's inside" , "Things inside" , "List of everything included" , "Satisfies the list of chapters" .)