Historical clue formulations

• Firmly planted — 2025-08-31
• With 29-Across, like a deer in headlights — 2020-06-28
• Searched for truffles, maybe — 2019-05-19
• Entrenched — 2018-07-11
• Rummaged — 2008-11-16
• Got behind, with "for" — 2006-05-07
• Firmly set — 2005-05-22
• Not adrift — 2003-09-14
• Searched for truffles, maybe — 1997-07-31
• Based (in) — 1997-06-01