Flat and broad cakes that must be flipped (4)
I believe the answer is:
snub
'flat and broad cakes that must be flipped' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'cakes that must be flipped' is the wordplay.
'cakes' becomes 'buns' (cake is a type of bun).
'that must be flipped' says the letters should be written in reverse.
'buns' backwards is 'SNUB'.
Can you help me to learn more?
(Other definitions for snub that I've seen before include "Insult; blunt (nose)" , "Treat with disdain" , "Spurn; (of nose) turned up at the end" , "Rebuff or reject overture" , "Check" .)