Censures, informally (6)

I believe the answer is:

slates

(Other definitions for slates that I've seen before include "Strongly criticise the roof tiles" , "Criticises severely using roof coverings" , "Thin layers of rock for roofing" , "Berates with roofing tiles" , "Abuses with roof tiles?" .)

I've seen this clue in the Evening Standard.

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