Strong criticism (4)

I believe the answer is:

flak

'strong criticism' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for flak that I've seen before include "Anti-aircraft fire - strong criticism" , "Bad press" , "complaints" , "Severe criticism" , "Shooting" .)

I've seen this clue in the Universal, The Independent, The Times, The Wall Street Journal and the King Feature Syndicate.

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