Related Clues:

• Hail, of yore
• "Arrivederci!"
• Cry in old Rome
• Schubert's '___ Maria'
• ''Later!'', in Rome
• North-south route, in NYC
• 'Hail!' in old Rome
• Casual farewell
• Fifth in NYC, e.g.
• North-south rte., in New York City
• Pennsylvania in D.C., e.g.
• "Ta-ta"
• Commonwealth in Boston, e.g.: Abbr.
• "Ciao, Caesar"
• Urban way: Abbr.