Historical clue formulations

• Curses ... or what 18-, 20-, 26-, 48-, 57- and 63-Across are, literally? — 2018-01-16
• Profanities (and a hint to this puzzle's anomalies) — 2009-07-30
• Colorful language — 2005-08-04
• What this crossword completely lacks — 2003-03-28