Historical clue formulations

• Baby blue, perhaps — 2025-05-10
• Eye, slangily — 2024-02-19
• Eye, slangily — 2021-04-09
• Tree frog with a distinctive call — 2016-11-17
• Eye — 2014-11-06
• Voyeur — 2013-09-20
• Eye — 1999-03-13
• Frog — 1994-07-03