Crossword Genius

He's a new arrival (6)

Ross

I believe the answer is:

justin

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'he's' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for justin that I've seen before include "Boy's name" , "-- Timberlake, singer" , "Boy" .)

I've seen this clue in the Evening Standard.
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