Not a hub, a foreign motorway (8)
I believe the answer is:
autobahn
'motorway' is the definition.
(autobahn is a kind of motorway)
'not a hub a foreign' is the wordplay.
'foreign' indicates anagramming the letters (foreign order of the letters).
'not'+'a'+'hub'+'a'='notahuba'
'notahuba' anagrammed gives 'AUTOBAHN'.
(Other definitions for autobahn that I've seen before include "German lanes" , "German or Austrian motorway" , "Great way" , "high-speed route" , "It takes continental drivers" .)