I can go on and on about European travelling from place to place (9)
I believe the answer is:
itinerant
'travelling from place to place' is the definition.
(I've seen this before)
'i can go on and on about european' is the wordplay.
'can' becomes 'tin' ('tin' can be a synonym of 'can').
'go on and on' becomes 'rant' (I've seen this before).
'about' says to put letters next to each other.
'european' becomes 'e' (abbreviation e.g. EU).
'rant' put after 'e' is 'erant'.
'i'+'tin'+'erant'='ITINERANT'
(Other definitions for itinerant that I've seen before include "Wandering from place to place" , "Moving from place to place" , "(Person) on the move" , "Rambling" , "Nomadic" .)