Historical clue formulations

• Least straightforward, say — 2026-05-09
• Most cunning — 2020-04-29
• Most foxy — 2019-01-13
• Maximally wily — 2018-03-29
• Like the fox, among all animals — 2002-07-18
• Least candid — 2002-07-13
• Least ingenuous — 2001-12-29
• Most foxlike — 2001-11-18
• Maximally sharp — 2001-09-22
• Least open — 2001-07-13
• Most like Iago — 1999-11-21
• Superlatively slick — 1999-09-05
• Most vulpine — 1998-05-02
• Most cunning — 1995-08-14