Historical clue formulations

• Flash point? — 2025-07-25
• Flash of inspiration — 2024-01-19
• Epiphany — 2021-09-12
• Sudden insight ... with a hint to 17-, 24-, 40- and 50-Across — 2020-04-27
• When you get it — 2016-11-22
• Epiphany — 2015-05-04
• Clicking point — 2014-08-16