Historical clue formulations

• ___ orange, tree whose fruit has a brainlike appearance — 2026-09-20
• Great Plains nation — 2026-02-04
• Indigenous people at the center of 2023's "Killers of the Flower Moon" — 2026-01-08
• Tribe in "Killers of the Flower Moon" — 2025-05-03
• "Killers of the Flower Moon" tribe — 2024-03-24
• "August: ___ County" (Pulitzer-winning play) — 2024-03-05
• Missouri River tributary — 2022-08-09
• ___ orange — 2022-05-25
• Tributary of the Missouri River — 2022-05-03
• "August: ___ County" (Tracy Letts play) — 2022-05-01
• ___ orange — 2020-09-12
• Inedible kind of orange — 2019-12-20
• River named for a Plains tribe — 2019-05-29
• Plains tribe — 2019-01-06
• County in a Pulitzer-winning play title — 2018-11-30
• County name in Kansas, Missouri and Oklahoma — 2018-08-16
• ___ orange — 2017-12-04
• Missouri river or tribe — 2017-01-16
• Major tributary of the Missouri — 2016-03-11
• River to the Missouri — 2016-01-27
• "August: ___ County" (2008 Pulitzer Prize-winning play) — 2014-12-29
• ___ orange — 2014-05-28
• Oklahoma Indian — 2014-04-16
• Missouri's ___ River — 2013-12-12
• "August: ___ County" (2008 Pulitzer winner for Drama) — 2013-11-10
• Traditional enemies of the Kiowa — 2013-03-24
• Missouri river to the Missouri River — 2012-04-03
• Missouri river or tribe — 2011-07-25
• County name in Kansas, Missouri and Oklahoma — 2010-04-29
• Dakota relative — 2010-04-02
• Lake of the Ozarks feeder — 2010-03-31
• With 21-Across, native Oklahoma group — 2010-03-28
• Missouri Indian — 2010-01-05
• Missouri river or Indian — 2009-10-26
• ___ orange — 2009-07-27
• Missouri feeder — 2008-10-12
• Language related to Winnebago — 2008-10-10
• County in Kansas, Missouri or Oklahoma — 2008-10-04
• Missouri River tributary — 2008-07-02
• Missouri river — 2008-06-10
• Bagnell Dam river — 2007-04-22
• Plains tribe — 2007-04-15
• Fort on the Missouri — 2005-06-11
• Bagnell Dam river — 2004-03-12
• ___ orange — 2003-11-15
• Inedible orange — 2003-08-13
• River that feeds the Missouri — 2002-12-11
• Missouri river — 2002-06-10
• Missouri River tributary — 2002-05-09
• Missouri River tributary — 2001-10-16