Criticise severely (4)

I think it could be either:

Which length description are you looking for?:

4,3,1,5

slam

(Other definitions for slam that I've seen before include "Ambitious contract" , "major contract" , "Severely criticise; shut (a door) forcefully" , "Shut loudly and forcibly" , "Winning of 12 or 13 tricks at bridge" .)

I've seen this clue in The Sun.

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