Historical clue formulations

• Comic actor Van Dyke — 2025-12-15
• Veep between Al and Joe — 2017-07-15
• Presidential nickname — 2017-06-21
• Author Philip K. ___ — 2013-10-09
• See 9-Across — 2009-08-12
• 16-Across, to some — 2001-02-17
• Tracy of the comics — 2000-06-05
• Gumshoe — 1999-08-15
• Former White House nickname — 1998-02-22
• Button on the ice — 1997-11-29
• Gumshoe — 1997-10-26