Historical clue formulations

• Scare stiff — 2026-09-20
• Give the heebie-jeebies — 2025-02-03
• Startle — 2024-08-16
• Unnerve — 2023-02-23
• Unnerve — 2016-10-16
• Bogeyman — 2015-02-18
• Scare slightly — 2011-06-08
• Cloak-and-dagger person — 2002-04-24
• Scare — 2001-09-19
• Spirit — 1994-02-17