Related Clues:
- Flag bearer
- Official in a striped shirt
- Worker among players
- O.E.D., e.g.
- Ruling official
- KO caller
- Ump's football counterpart
- Fight stopper, maybe
- He calls the shots
- Dict., for one
- Sports "zebra"
- "Offside" official
- One may determine if a line has been crossed
- Maker of calls
- Official who ensures fair play