Related Clues:

• Cincinnati threesome
• Rank on the U.S.S. Enterprise: Abbr.
• There are two in a penny
• USN rank
• Pair of nines?
• Lunch has one, dinner has two
• Some dash lengths
• ''Manon'' duet?
• Two of nine?
• Lennon's trio
• Coast Guard rank: Abbr.
• Printer's measure
• Printing widths
• Coast Guard mem.
• London has two