Possible Clues:

• Sardinian passion
• Lombardy love
• ". . . ___ perfect union . . ."
• It makes il mondo go round
• "That's ___" (Dean Martin hit)
• Pet food brand for pampered felines
• A many-splendored thing in Italy?
• "When the moon hits your eye" emotion
• Casanova's love
• That's a subject for Dean Martin!