The crossword solution for the term 'Explosive Sicilian' is ETNA, which is a reference to Mount Etna, an active stratovolcano located on the east coast of Sicily. Mount Etna is one of the most active volcanoes in the world and has been erupting for thousands of years. It is known for its frequent and sometimes violent eruptions, making it an apt description for the term 'Explosive Sicilian'.