Historical clue formulations

• Ones making you duck down? — 2021-06-20
• Ducks known for their soft down feathers — 2021-05-30
• Ones holding down things? — 2017-10-15
• Courses that get you down? — 2016-09-15
• What may make you duck down? — 2015-05-10
• Commercially prized ducks — 2011-03-09
• Ducks for cover? — 2011-02-24
• Coastal island colonists — 2009-10-16
• You can get down from them — 2006-03-17
• Some ducks — 2004-02-01
• Large sea ducks — 2002-08-18
• Ducks renowned for their down — 1999-06-28