Possible Clues:

• Island where spring starts frostily
• Island's south as frozen?
• Sick as a dog temporarily going around island
• Island, capital Palermo
• Island company that was involved in cunning
• Mount Etna's island
• Catania locale
• It's found near the toe of a boot
• Island with capital Palermo
• Can you get to the south of the island in a frozen sort of way?