Middle Easterner’s second car (5)
I believe the answer is:
saudi
'middle easterner's' is the definition.
(Saudi Arabia is in the Middle East)
'second car' is the wordplay.
'second' becomes 's' (common abbreviation).
'car' becomes 'audi' (Audi is a German car brand).
's'+'audi'='SAUDI'
(Other definitions for saudi that I've seen before include "one accustomed to hot, dry conditions?" , "Not hard" , "Native of kingdom" , "One from Riyadh" , "Native of Riyadh, possibly" .)