Historical clue formulations

• He doesn't belong ... or a hint to the circled letters in 16-, 23-, 36-, 38- and 48-Across — 2025-11-20
• Single guy? — 2024-03-10
• One that doesn't belong — 2013-12-03
• One who doesn't click in a clique — 2013-04-27
• Conspicuous one — 2005-04-29
• Elimination method — 1998-08-22
• Elimination game — 1997-01-10