Course from Kandahar out established (5)
I believe the answer is:
route
'course' is the definition.
(both can mean a path)
'from kandahar out established' is the wordplay.
'from' indicates a hidden word.
'ROUTE' can be found hidden inside 'kandahar out established'.
(Other definitions for route that I've seen before include "Course of 7" , "Way travelled" , "Path taken" , "Itinerary; way" , "track" .)