Historical clue formulations

• See 43-Across — 2021-02-17
• Undesirable plane seat — 2020-12-13
• Word before school or class — 2017-06-29
• Word with finger or America — 2016-10-31
• With 44-Down, educational stage ... or a hint to the contents of 18-, 22-, 47- and 53-Across — 2010-07-29
• Waist, approximately — 2003-07-24
• Torso — 2002-04-24
• Kind of linebacker — 1998-06-14
• Bull's eye — 1995-10-21