Historical clue formulations

• Kind of policy that encourages transparency from leadership — 2025-06-01
• Welcoming symbol ... or what each part of the answers to the six starred clues can do? — 2013-02-14
• Welcome indicator — 2007-01-11
• McKinley policy for China — 2006-02-15
• Symbol of welcome — 2001-08-06
• Unrestricted opportunity — 2001-06-30
• Sign that all are welcome — 1998-03-17