Route taken by an Asian (6)
I believe the answer is:
pathan
'asian' is the definition.
(Pathan is an example)
'route taken by an' is the wordplay.
'route' becomes 'path' ('path' can be a synonym of 'route').
'taken by' means one lot of letters go next to another.
'path'+'an'='PATHAN'
(Other definitions for pathan that I've seen before include "Member of majority people of Afghanistan" , "Afghanistani" , "Afghan" .)