Historical clue formulations

• Zest — 2025-08-31
• What old paint might do — 2025-05-21
• Source of zest — 2024-12-11
• Slippery part of a banana — 2024-08-05
• Pizzeria implement — 2024-06-13
• Banana discard — 2024-01-08
• Certain spa treatment — 2023-08-27
• Part usually thrown away — 2022-12-23
• Banana skin — 2022-12-13
• Chemical ___ — 2022-10-07
• Certain spa treatment — 2022-06-19
• Bit of kitchen waste — 2022-03-20
• Leave quickly, with "out" — 2022-03-04
• Spa offering — 2022-02-12
• Banana skin — 2022-01-03
• Outside of an orange — 2021-12-06
• Fibrous part of a potato — 2021-09-10
• Banana leftover — 2020-11-09
• Zest — 2020-06-07
• Source of zest — 2020-05-31
• Strip — 2020-05-02
• Spa offering — 2019-11-24
• Spa option — 2019-04-27
• Hightail it away, with "out" — 2019-03-19
• Spa treatment — 2018-12-25
• Get over a sunburn, maybe — 2018-04-23
• Something you might slip on — 2018-04-04
• Spa treatment — 2018-01-14
• Rind — 2017-06-12
• Lose a tan, say — 2016-08-14
• Exfoliation — 2016-07-09
• Skin treatment at a spa — 2015-05-25
• Rind — 2015-03-09
• Spa treatment — 2015-01-22
• Result of a burn — 2014-12-28
• Bare it all — 2014-09-17
• Banana waste — 2013-03-20
• Day spa treatment — 2012-07-29
• Orange exterior — 2012-03-23
• See 54-Down — 2011-11-15
• Strip — 2011-09-04
• Plastic surgeon's procedure — 2009-08-23
• Emma of "The Avengers" — 2009-08-09
• Suffer from sunburn — 2009-02-17
• Leave rubber, with "out" — 2008-09-07
• Marmalade component — 2008-04-27
• Zest — 2007-12-27
• Skin — 2007-11-04
• Result of a day at the beach? — 2007-10-20
• Strip — 2007-10-05