Historical clue formulations

• Dressage competitor — 2021-08-25
• Contract add-on — 2016-11-30
• Equestrian, e.g. — 2016-05-03
• Equestrian, e.g. — 2014-11-05
• Equestrian, e.g. — 2014-01-07
• Line-item veto target, often — 2012-07-14
• Headless Horseman, e.g. — 2010-04-25
• Fare payer — 2008-05-20
• Bill tack-on — 2007-12-25
• Amendment — 2007-03-03
• Bill add-on — 2006-11-22
• Piece of pork? — 2006-08-12
• Hitchhiker — 2006-05-28
• Passenger — 2005-11-21
• One in a habit — 2005-06-25
• Equestrian — 2005-01-10
• Addition to a bill — 2004-11-25
• Jockey — 2003-10-16
• Bill tack-on — 2003-07-08
• It may be added to the bill — 2002-05-17
• Document amendment — 2002-02-25
• Equestrian — 2001-01-01
• Bill attachment — 1998-06-25
• Agreement adjustment — 1997-11-29
• Contract add-on — 1997-05-05
• It's added to the bill — 1997-05-04
• Legislative postscript — 1996-10-13
• Bill addition — 1996-03-12
• Codicil — 1996-03-03
• Jockey — 1995-11-18
• Fare — 1995-04-08
• Policy postscript — 1995-02-15
• Equestrian — 1994-10-31