Historical clue formulations

• Reason for a tucked tail, perhaps — 2025-09-03
• Basis of some admissions — 2025-01-03
• It "has very quick ears to an accusation," per Henry Fielding — 2015-04-03
• ___-free (low-cal, maybe) — 2013-07-03
• Burden of the conscience-stricken — 2010-12-07
• Kind of trip — 2006-09-02
• Subject of this puzzle — 2004-12-09
• ___ trip — 2003-12-26