Catch part of the argument (4)

I believe the answer is:

hear

'catch' is the definition.
(to catch something is to hear it being spoken)

'part of the argument' is the wordplay.
'part of' indicates the answer is hidden within the clue.
'HEAR' can be found hidden inside 'the argument'.

(Other definitions for hear that I've seen before include "Perceive with the ear" , "Catch" , "Find out" , "Discover aurally" , "Listen to" .)

I've seen this clue in The Times.

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