He's recently arrived (6)
I believe the answer is:
justin
'he's' is the definition.
(I've seen this before)
'recently arrived' is the wordplay.
'recently' becomes 'just' (I've seen this before).
'arrived' becomes 'in' (I've seen this in other clues).
'just'+'in'='JUSTIN'
(Other definitions for justin that I've seen before include "Boy" , "Boy's name" , "-- Timberlake, singer" .)