Enemy shot one Arab (6)
I believe the answer is:
yemeni
'arab' is the definition.
(I know that Yemeni is a type of arab)
'enemy shot one' is the wordplay.
'shot' indicates an anagram.
'one' becomes 'I' (Roman numeral).
'enemy' with letters rearranged gives 'yemen'.
'yemen'+'i'='YEMENI'
(Other definitions for yemeni that I've seen before include "Someone from Aden?" , "Inhabitant of the country at the southern end of the Arabia" , "Relating to a republic on the Arabian Peninsula" , "language" , "Middle Easterner" .)