Passing arguments to a Pages

I've a page (i.e. under Pages directory) called dettaglio_regione.ctp. I want to set URLs like http://.../clienti/[[regione]], so a working URL should be something like http://.../clienti/Campania or http://.../clienti/Sicilia and so on.

I need to grab the content of [[regione]]. How I've to set the route?

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