Historical clue formulations

• One who might work in the wings of a theater — 2018-12-12
• Prompter? — 2017-01-05
• One in a prompt box — 2012-03-08
• Move caller for a round dance — 2009-02-07
• Round dance official — 2007-10-24
• Stage assistant — 2007-05-22
• One calling the moves for a round dance — 2006-05-13
• Signal caller — 2006-02-02
• Prompt giver — 2005-04-19
• Stage assistant — 2003-08-03
• Line feeder — 1999-08-18
• Square dance official — 1998-07-03