Historical clue formulations

• Blue feeling — 2025-02-04
• James Brown genre — 2022-10-28
• "I only got a seventh-grade education, but I have a doctorate in ___": James Brown — 2021-01-27
• Sly and the Family Stone genre — 2020-05-24
• Blue state? — 2020-03-03
• Musical genre featuring slap bass — 2007-05-11
• Depression — 2004-02-13
• Name on a dictionary — 2000-10-15
• See 47-Across — 1998-05-25
• Depression — 1994-09-17