Historical clue formulations

• Treble symbol — 2022-11-15
• Treble sign — 2011-05-23
• E is its lowest note — 2010-08-15
• Indicator of high-level staff? — 2009-06-20
• Sign of treble? — 2008-06-05
• Score sign — 2004-06-20
• Symbol at the head of a musical staff — 2004-05-03
• Staff leader? — 2002-11-24
• Score figure — 2002-01-12
• Staff figure — 2001-08-16
• Staff leader? — 1999-08-13
• Staff leader? — 1997-10-18
• Staff leader — 1994-03-14