Possible Clues:

• "When the moon hits your eye" emotion
• Love, in Italia
• It's "when the moon hits your eye like a big pizza pie"
• Love of Tuscany?
• Strong emozione
• 91-Down, Italian-style
• That's a subject for Dean Martin!
• Casanova's love
• Dino sang about it
• "That's ___" (Dean Martin hit)