Historical clue formulations

• U.S.A., USB or U.S.C. — 2023-02-09
• E.g., e.g. — 2021-04-21
• Shortening, for short — 2021-03-18
• Dict. tag — 2020-10-05
• Ph.D., for one — 2020-06-26
• Shortened word, for short — 2019-12-02
• Mon., for Monday — 2019-11-18
• Dem. or Rep., e.g. — 2019-10-09
• Rep. or Dem., e.g. — 2017-08-30
• Cal. or Calif., for California — 2015-06-02
• OH or HI — 2015-05-21
• Self-descriptive crossword answer — 2013-06-18
• E.g., e.g. — 2013-02-25
• Answer that's an example of itself — 2011-11-26
• Lb. or oz., e.g. — 2010-08-25
• R.B.I. or E.R.A., e.g. — 2008-06-06
• E.g., e.g. — 2007-11-21
• 39-Down, e.g. — 2003-03-03
• Certain dict. entry — 2001-09-28
• Answer that's an example of itself — 2000-11-16
• Shortened form, in shortened form — 1998-07-13
• This answer, for instance — 1998-06-20
• Tues., for Tuesday — 1997-09-02
• A.M. or P.M., e.g. — 1995-02-28
• This ans., e.g. — 1995-02-21