Historical clue formulations

• Crossword solver's correction mark — 2024-09-09
• Deletion — 2022-05-24
• Evidence of a crossword solver's mistake, maybe — 2021-11-07
• Rubber production? — 2020-11-07
• Mark never seen in an online crossword — 2017-12-26
• Gap in a tape, maybe — 2017-04-27
• Part of a not-so-clean slate — 2016-12-31
• Job done with Artgum — 2015-08-06
• What a smudge may indicate — 2011-03-30
• Expunction — 2010-12-26
• Wipeout? — 2006-01-07
• Sign of a slip — 2004-07-17
• Complete removal — 2004-05-20
• Start of some corrections — 2003-10-17
• Disappearing act? — 2003-04-06
• Sign of uncertainty — 2002-08-24
• Evidence of change — 2002-02-08
• Occasional puzzle solver's action — 2001-08-29
• Kind of mark — 2001-08-11
• Wipeout? — 2001-06-24
• Takeout — 2001-06-17
• Sign of a slip — 2001-04-01
• Start of a correction — 2000-12-18
• Sign of a goof — 2000-08-13
• Start of a correction — 1998-12-03
• Correction — 1998-04-16
• Correction, of sorts — 1998-01-18
• Mark of uncertainty — 1997-05-11
• Rubout — 1996-06-05
• Rubout — 1995-12-03
• Acknowledgment of error? — 1995-01-21
• Deletion — 1994-12-28