Related Clues:

• N N N
• Funny couple?
• One-third of ninety?
• Printing spaces
• Nixon has two
• Halves of 1-Across
• Widths of typical characters
• Lengths of some dashes
• Off. above a midshipman
• Off. at sea
• Typesetting spaces
• Thinning in the middle?
• "Ninny" uses three
• S.Sgt., e.g.
• Jr. naval officer