Historical clue formulations

• Flag bearer — 2023-10-13
• Professional dressed in black and white — 2023-08-14
• Zebra — 2021-10-16
• Whistle blower — 2020-12-25
• Ringmaster? — 2018-08-04
• Ring separator — 2013-03-27
• Enforce the rules — 2008-02-02
• Grid coin tosser — 2005-03-16
• One who might count you out — 2004-02-28
• One may use hand signals — 2001-08-02
• "Foul!" caller — 1998-06-01
• Ring figure — 1996-05-14