Crossword Genius

A sharp rebuke about cakes (4)

Ross

I believe the answer is:

snub

I'm a little stuck... Click here to teach me more about this clue!

'a sharp rebuke' 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?

'about cakes' is the wordplay.
'about' is a reversal indicator.
'cakes' becomes 'buns' (cake is a type of bun).
'buns' backwards is 'SNUB'.

Can you help me to learn more?

(Other definitions for snub that I've seen before include "Reject greeting, seek to humiliate" , "put down" , "Reject greeting or approach" , "Rebuff; brush-off" , "Ignore, spurn disdainfully" .)

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