Crossword Genius

Practicing travelling by rail? (8)

Ross

I believe the answer is:

training

I'm a little stuck... Click here to teach me more about this clue!

This clue could be a double definition.

'practicing' is the first definition.
The definition and answer can be both related to thinking as well as being present participle verbs.
Maybe there's an association between them I don't understand?

'travelling by rail?' is the second definition.
The definition and answer can be both to do with motion as well as being present participle verbs.
Perhaps you can see a link between them that I don't see?

Can you help me to learn more?

(Other definitions for training that I've seen before include "Tuition" , "Preparing for athletic performance" , "Coaching" , "Doing exercise" , "Process of instruction" .)

I've seen this clue in the Sydney Morning Herald.
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