Historical clue formulations

• Cleaning professionals — 2024-05-20
• Octet in "The Twelve Days of Christmas" — 2018-11-16
• Octet in "The 12 Days of Christmas" — 2017-12-07
• Some cleaners — 2016-03-06
• Some help they are! — 2014-12-31
• Some motel employees — 2013-05-06
• Eight milkers in "The 12 Days of Christmas" — 2012-04-02
• Dust busters — 2010-04-20
• Ones who'll straighten you up? — 2009-09-20
• Hotel employees — 2008-12-03
• Changers of 34-Across — 2007-11-01
• Hotel staffers — 2005-03-23
• Yum-Yum, Peep-Bo and Pitti-Sing in "The Mikado" — 2004-06-19
• Dust busters — 2003-12-21
• Hotel staff — 2002-02-28
• Hotel cleaners — 2000-08-14
• Hotel force — 1998-12-27
• Lasses — 1996-01-01