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Long-distance traveller finished with school? (7,5)

Ross

I believe the answer is:

through train

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'long-distance traveller' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'finished with school?' is the wordplay.
'finished' becomes 'through' (similar in meaning).
'with' says to put letters next to each other.
'school?' becomes 'train' (school can mean to train or coach).
'through'+'train'='THROUGH TRAIN'

Can you help me to learn more?

(Another definition for through train that I've seen is " Rail service covering a whole route".)

I've seen this clue in The Telegraph.
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