Historical clue formulations

• One arm held up with bent elbow and wrist, in a children's song — 2021-09-12
• Teakettle feature — 2012-05-15
• Teapot part ... or a two-word hint to 16-, 25-, 43- and 59-Across — 2010-04-28
• Jet — 2009-05-29
• Gush — 1999-05-03
• State oratorically — 1997-01-05