Possible Clues:

• Bay of Naples island
• Island school, one on a detached part of Italy
• Tourist island in the Gulf of Naples
• Volcanic Italian island known for its spas
• Island in the Tyrrhenian Sea
• Island at the north end of the Bay of Naples
• A volcanic island in the Tyrrhenian Sea
• Volcanic island near Naples
• Insular offshore location's funds protecting Greek character
• Island savings scheme penetrated by foreign character