I hear you on the radio (5)

I believe the answer is:

roger

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'i hear you' is the definition.
(radio communications)

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

(Other definitions for roger that I've seen before include "Radio confirmation" , "Received (in radio comms)" , "Radio acknowledgment" , "I have heard on the radio" , "One like de Coverley" .)

I've seen this clue in The Guardian.

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