Historical clue formulations

• Boil … or a sign of boiling — 2026-08-13
• Something to blow off or let off — 2026-03-09
• What a hot iron may give off — 2025-11-04
• Vapor from a teapot — 2025-06-23
• Energy, idiomatically — 2024-10-28
• What hot showers create — 2024-09-16
• What fumaroles emit — 2024-08-11
• Eruption from a geyser — 2024-06-24
• Power source for old locomotives — 2022-11-15
• Driver of some engines — 2022-10-30
• Emission from a whistling kettle — 2022-06-21
• Hot shower emanation — 2022-05-23
• Use a rice cooker, e.g. — 2022-03-29
• Lose ___ — 2022-01-29
• Cook, as vegetables — 2021-10-25
• Early auto engine's power source — 2021-04-05
• Power source for early engines — 2021-03-02
• Cook, as mussels — 2020-11-30
• Tick off — 2020-09-11
• Prepare rice, perhaps — 2020-07-21
• Head of ___ — 2020-07-19
• What locomotives and irons may give off — 2019-12-30
• Tee off — 2019-09-05
• Letter opener? — 2019-03-03
• Prepare, as mussels — 2019-01-14
• Sauna sight — 2018-09-04
• Tick off — 2017-04-29
• Sauna feature — 2017-02-14
• Whistle blower? — 2016-10-21
• Mirror buildup, at times — 2016-09-25
• Tick off — 2016-04-09
• Early car powerer — 2015-09-30
• Old-fashioned letter opener — 2015-08-22
• Cook, as dim sum — 2015-07-01
• Manhole emanation — 2015-06-03
• Iron setting — 2015-01-18
• What comes out of an angry person's ears in cartoons — 2014-09-23
• Tick off — 2013-02-02
• Momentum, informally — 2012-08-21
• Really tick off — 2012-03-30
• Tick off — 2011-09-11
• Good thing to build up or blow off — 2011-05-30
• Boiling indication — 2010-01-04
• Energy source — 2009-03-22
• Pressing need? — 2009-02-22
• Pressing need? — 2008-10-26
• Heating choice — 2008-06-17
• Tick off — 2008-01-24
• Geyser's emission — 2007-04-16
• Power for Robert Fulton — 2006-11-20