Historical clue formulations

• Port on the Firth of Clyde — 2014-12-02
• Firth of Clyde port — 2013-12-10
• Firth of Clyde port — 2013-05-22
• Scottish port — 2012-12-14
• Robert Burns's birth county — 2012-09-01
• Scottish seaport — 2011-05-17
• Scottish seaport — 2010-01-17
• Firth of Clyde town — 2009-05-19
• Firth of Clyde river — 2006-07-01
• Strathclyde port — 2004-07-16
• Firth of Clyde port — 2002-10-04
• Historic Scottish county — 2002-02-21
• Firth of Clyde port — 1998-11-28
• Scottish river — 1996-04-14
• Robert Burns's birthplace — 1995-04-20
• Firth of Clyde port — 1994-11-26
• Burgh on the Firth of Clyde — 1994-10-29
• Burns's birthplace — 1994-04-21