Crossword Genius

'Allow the flesh to congeal'? Notoriously callous pronouncement (3,4,3,4)

Ross

I believe the answer is:

let them eat cake

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

'notoriously callous pronouncement' is the definition.
I know nothing about this answer so I cannot tell whether this works.

''allow the flesh to congeal'?' is the wordplay.
''allow' becomes 'let' (synonyms).
'flesh' becomes 'meat' (flesh is meat).
'to congeal'?' becomes 'cake' (I've seen this in another clue).
'let'+'the'+'meat'+'cake'='LET THEM EAT CAKE'

Can you help me to learn more?

(Another definition for let them eat cake that I've seen is " words from old queen".)

I've seen this clue in The Everyman puzzle in The Observer.
Want a hint initially instead of a full solution? Install my app