Related Clues:

• Hadrian's hail
• GPS display
• Gladiator's greeting
• Park, e.g., in N.Y.C.
• Roman salutation
• Fifth in NYC
• ''Hi, Claudius''
• Galba's greeting
• ''Good morning, Caesar''
• Greeting at the Forum
• Latin for hail
• ''Hail!'' to Horace
• NYC's Fifth, for one
• ''Hello, Caesar''
• Pa. or Mass., in DC