Crossword Genius

Comrades rolling up blue carpet (4,4)

Ross

I believe the answer is:

slap down

'carpet' is the definition.
(informal term meaning to criticise somebody)

'comrades rolling up blue' is the wordplay.
'comrades' becomes 'pals'.
'rolling up' says the letters should be written in reverse.
'blue' becomes 'down' (I've seen this before).
'pals' written backwards gives 'slap'.
'slap'+'down'='SLAP DOWN'

I've seen this clue in The Times.
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