The Roman way of travel (3)

I believe the answer is:

via

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'the roman way' is the definition.
(term for a street in Italian eg in Rome)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for via that I've seen before include "By means of" , "Roman road" , "By way of - in Latin" , "Passing through" , "A Roman way" .)

I've seen this clue in the Evening Standard.

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