Move abroad good coming into Arab state (8)
I believe the answer is:
emigrate
'move abroad' is the definition.
(I've seen this before)
'good coming into arab state' is the wordplay.
'good' becomes 'g' (abbreviation).
'coming into' means one lot of letters goes inside another.
'arab state' becomes 'emirate' (I've seen this before).
'g' put into 'emirate' is 'EMIGRATE'.
(Other definitions for emigrate that I've seen before include "Leave to settle in another country" , "Leave homeland" , "Leave the country to settle abroad" , "Gear item (anag.)" , "Move abroad" .)