He's OK! (5)

I believe the answer is:

roger

This clue is a double definition.

'he's' is the first definition.

'ok' is the second definition.
(I've seen this before)

(Other definitions for roger that I've seen before include "R in telecommunications" , "Received (in radio comms)" , "Expression of agreement" , "Ackroyd" , "I have heard on the radio" .)

I've seen this clue in The Telegraph.

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