Italian erupter

ETNA

This active volcano on Sicily is Europe's highest and has been erupting for thousands of years, often named after a nearby city.

Italian erupter" is a straightforward clue pointing to Mount Etna, the famous active volcano in Sicily. The word "erupter" hints at a volcano, and "Italian" narrows it down to one of Italy’s most well-known peaks. Since "Etna" fits both the definition and the letter count, it’s the clear answer.