Cry out - to the police? (6)

I believe the answer is:

squeal

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'cry' is the definition.
(thesaurus)

I cannot understand how the rest of the clue works.

(Other definitions for squeal that I've seen before include "Inform (as a pig would?)" , "Spill the beans" , "Equals (anag)" , "Make shrill noise like stuck pig" , "Make shrill cry like stuck pig" .)

I've seen this clue in The Globe and Mail.

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