Stop a criminal proceeding? (6)

I believe the answer is:

arrest

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'stop' is the definition.
(I know that stop can be written as arrest)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for arrest that I've seen before include "Stop - detain" , "apprehend a law-breaker" , "Nab" , "Seize and take into custody" , "Bring to a standstill" .)

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

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