Historical clue formulations

• Ballpark purchase in a bun — 2021-10-25
• Plain-speaking — 2021-02-09
• With 30-Across, is blunt — 2018-02-18
• Architect Gehry — 2017-07-16
• Candid — 2017-07-09
• Open — 2013-04-20
• Open — 2009-02-07
• Open — 2008-07-06
• Bite at the ballpark — 2003-09-17
• Open — 2000-03-26
• Ol' Blue Eyes — 1996-06-10
• Street vendor's offering — 1996-02-11
• Blunt — 1994-06-02
• Ball-park dinner — 1994-02-06