Try to catch what's said (4)

I believe the answer is:

hear

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'try' is the definition.
(as in to try someone in court or hear their case)

I don't understand how the rest of the clue works.

(Other definitions for hear that I've seen before include "Perceive audibly" , "Catch" , "Find out" , "Pick up, aurally" , "Perceive aurally" .)

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

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