Arab in USA I’d relocated (5)
I believe the answer is:
saudi
'arab' is the definition.
(I know that Saudi is a type of arab)
'usa i'd relocated' is the wordplay.
'relocated' indicates an anagram.
'usa'+'id'='usaid'
'usaid' is an anagram of 'SAUDI'.
'in' acts as a link.
(Other definitions for saudi that I've seen before include "Middle-Easterner" , "M East citizen" , "Native of Riyadh, perhaps" , "one accustomed to hot, dry conditions?" , "One from Riyadh" .)