Related Clues:

• Official in a striped shirt
• Ballpark fig.?
• Worker among players
• O.E.D., e.g.
• Ruling official
• One wearing black at home
• KO caller
• Ump's football counterpart
• Fight stopper, maybe
• He calls the shots
• Dict., for one
• Guy crouching at the park
• Sports "zebra"
• One at home in a mask
• "Offside" official