Travelling by train, running to catch the one ten out (9)
I believe the answer is:
itinerant
'one ten out' is the definition.
Both the answer and definition are adjectives. Perhaps you can see an association between them that I don't see?
'travelling by train running to catch' is the wordplay.
'travelling by' becomes 'tine' (I can't explain this - if you can you should give a lot more credence to this answer).
'running' indicates anagramming the letters (the letters run around to different places).
'to catch' indicates putting letters inside.
'train' anagrammed gives 'irant'.
'tine' going inside 'irant' is 'ITINERANT'.
'the' acts as a link.
Can you help me to learn more?
(Other definitions for itinerant that I've seen before include "Tie-in rant to a traveller" , "Travelling around" , "(Person) on the move" , "Moving from place to place" , "Wandering from place to place" .)