Belgians had turned Asian (11)
I believe the answer is:
bangladeshi
'asian' is the definition.
(Bangladeshi is an example)
'belgians had turned' is the wordplay.
'turned' is an anagram indicator.
'belgians'+'had'='belgianshad'
'belgianshad' with letters rearranged gives 'BANGLADESHI'.
(Other definitions for bangladeshi that I've seen before include "From Dhaka, perhaps" , "Native of Dhaka" , "from South Asian republic" , "Foreigner" .)