Historical clue formulations

• Soft-serve request — 2026-09-13
• Switcheroo — 2026-05-30
• Distort — 2026-03-14
• Checker's move — 2024-12-06
• Unexpected plot development — 2023-12-18
• Surprise ending — 2021-09-05
• Citrus garnish in a mixed drink — 2019-07-02
• Turn into a pretzel — 2017-08-14
• 1960s dance craze — 2017-01-16
• Misconstrue, as words — 2015-10-04
• Craze started by Chubby Checker — 2014-12-09
• Plot feature — 2012-06-07
• Difficulty increaser in diving — 2011-04-23
• With 41- and 42-Across, 1964 Beatles hit — 2010-06-08
• Dance for Chubby Checker — 2009-07-29
• O. Henry specialty — 2009-02-11
• It's a surprise — 2006-09-22
• See 101-Down — 2005-08-21
• O. Henry plot specialty — 2004-11-11
• Peel in a drink — 2002-06-16
• Checker's move? — 2002-06-06
• 60's dance craze — 2002-01-01
• Chubby Checker's dance — 2000-09-25
• Murder mystery plot device — 2000-09-19
• Chubby Checker's dance — 1999-03-08
• Warp — 1994-09-07
• 1961 fad, with "the" — 1994-07-22