Related Clues:

• One hail of a greeting?
• Old salutation
• Greeting to Gaius
• Pennsylvania in D.C.
• N.Y.C.'s Madison ___
• Madison, in NYC
• Mailer’s shorthand
• Letters on business letters
• Letter routing abbr.
• Old welcome
• N.Y.C.'s Park or Madison
• GPS suggestion
• Letter-routing abbr.
• N.Y.'s Fifth, for one
• Roman 'Aloha'