Related Clues:

• Monarch, for one
• Pencil-box accessory
• Rapper in class?
• Ruler of a hive
• Certain head of state
• It may be checked
• Hirohito, e.g.
• King or queen, e.g.
• King or czar
• Chess piece
• It's made to measure
• Measuring aid
• Word with crab or cobra
• Ming the Merciless, e.g.
• CNN's Larry