Historical clue formulations

• A pelican can hold more water in this than in its belly — 2026-05-12
• Unwanted bit of mail — 2026-04-11
• Unwanted mail — 2026-01-03
• Unwanted piece of mail — 2025-01-20
• *Acronym of talks — 2023-04-06
• Bird's-eye view? — 2021-11-18
• Send an invoice — 2021-08-27
• Bird's beak — 2019-04-22
• Platypus feature — 2018-10-09
• With 29-Across, surprise in the mail — 2018-02-18
• Ten or twenty — 2017-09-03
• Unwelcome bit of mail — 2017-06-27
• New York City mayor de Blasio — 2016-10-31
• Unwelcome bit of mail — 2015-07-12
• One, for one — 2014-06-26
• Legislature's consideration — 2013-03-06
• Bit of avian anatomy — 2011-04-30
• Platypus part — 2009-12-13
• Unwanted mail — 2006-11-29
• Pecker — 2006-03-23
• One, for one — 2005-07-12
• Tab — 2005-01-23
• Check — 2004-03-10
• Green piece — 2002-12-26
• Unwelcome mail — 2001-02-27
• Tab — 2000-12-06
• Five or ten, e.g. — 1999-05-27
• Dun — 1999-01-24
• Player for coach Marv Levy — 1997-12-14
• Unwelcome mail — 1997-04-16
• Invoice — 1996-09-16
• Coo's partner — 1996-04-17
• "Show Boat" tune — 1995-11-26