Historical clue formulations

• Travel a winding route — 2026-07-19
• Plumber's drain-clearing device — 2024-01-23
• No-good conniver — 2023-11-03
• Creature that grows longer in a classic video game (also in this puzzle, when it "eats" a black square) — 2023-10-03
• With 38-Across, hidden traitor — 2023-06-28
• Type not to be trusted — 2021-04-12
• Meander — 2019-08-11
• Plumber's device — 2018-12-04
• Anaconda, e.g. — 2018-08-06
• Backstabber — 2018-01-26
• Clog clearer — 2017-07-09
• Wind this way and that — 2017-04-16
• Plunger alternative — 2017-02-12
• Plumber's unclogger — 2014-04-02
• Plumber's tool — 2009-01-28
• Wind — 2008-03-15
• Gem State stream — 2007-10-14
• What a charmer may charm — 2006-05-01
• Plumber's gadget — 2005-09-20
• Adder, e.g. — 2004-10-12
• Double-crosser — 2004-05-09
• Wind — 2002-12-07
• Viper, for one — 2002-09-16
• 2001's symbol, in the Chinese calendar — 2001-11-05
• Wind — 2000-08-31
• Venom carrier — 2000-01-17
• Lowlife — 1997-01-25
• Weave in and out — 1997-01-03
• Moccasin, e.g. — 1996-08-21
• Low character — 1995-03-23
• Hisser — 1995-01-18
• Moccasin without laces — 1994-07-31
• Plumbing tool — 1994-04-15