You old chaps from Arab country! (5)
I believe the answer is:
yemen
'arab country' is the definition.
(Yemen is a Middle Eastern country)
'you old chaps' is the wordplay.
'you old' becomes 'ye' (historical version of 'you').
'chaps' becomes 'men' (chap can mean a man).
'ye'+'men'='YEMEN'
'from' acts as a link.
(Other definitions for yemen that I've seen before include "Country bordering Oman" , "Republic sited on the SW corner of Arabia" , "Saudi neighbour" , "Country between the Red Sea and the Gulf of Aden" , "Arab country" .)