Related Clues:

• Paid whistle-blower, for short
• Ring or rink figure
• WWF official
• B-ball official
• Gridiron official, briefly
• Official decision maker
• Man in the ring
• Play judge
• Gridiron official
• Whistle-blower on a court
• Call maker
• Boxing arbiter
• Rules enforcer
• Ump's cousin
• Ring leader