Itinerant getting on beyond route (9)
I believe the answer is:
wayfaring
'itinerant' is the definition.
(thesaurus)
'on beyond route' is the wordplay.
'on' means one lot of letters go next to another.
'beyond' becomes 'faring' (I can't justify this - if you can you should give a lot more credence to this answer).
'route' becomes 'way' (way is a kind of route).
'faring' after 'way' is 'WAYFARING'.
'getting' is the link.
Can you help me to learn more?
(Another definition for wayfaring that I've seen is " Travelling on foot".)