Crossword Genius

He gives okay to pilots (5)

Ross

I believe the answer is:

roger

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'he' is the definition.

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for roger that I've seen before include "Received (in radio comms)" , "Sir - de Coverley, English country dance" , "that's clear" , "Message received; name" , "Boy's name - message understood" .)

I've seen this clue in The Sun.
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