Related Clues:

• Stars may represent them: Abbr.
• Greetings in old Rome
• Class that's for the birds
• 1st, 2nd, 3rd, etc.: Abbr.
• Hail Marys
• Main, Elm, etc.: Abbr.
• Rte. suggestions
• They go around the block: Abbr.
• Caesar's greetings
• 1st, 2nd and 3rd, e.g.: Abbr.
• Flying class?
• Wall et al.
• Ma and Pa
• Main and Oak (Abbr.)
• 2nd, 3rd, 4th, etc., in S.F.