Traveller needing motorway to get permit (7)
I believe the answer is:
migrant
'traveller' is the definition.
(I know that migrant is a type of traveller)
'motorway to get permit' is the wordplay.
'motorway' becomes 'MI' (resembles Mg, English motorway).
'to get' means one lot of letters go next to another.
'permit' becomes 'grant' (I've seen this in another clue).
'mi'+'grant'='MIGRANT'
'needing' is the link.
(Other definitions for migrant that I've seen before include "Animal moving seasonally" , "One travelling to find work" , "Moving across territories" , "Itinerant" , "one leaving the country" .)