Historical clue formulations

• Saxon's foe — 2025-10-19
• Foe of a Saxon — 2025-01-12
• British Isles inhabitant during the Iron Age — 2024-04-02
• Druid, e.g. — 2021-03-02
• Roman's foe in the Gallic Wars — 2020-10-17
• European of the Iron Age — 2019-06-05
• Speaker of Welsh or Breton — 2018-09-02
• TD Garden athlete, informally — 2017-05-23
• Influence for Enya, historically — 2017-04-20
• Knick rival — 2015-12-02
• Sixer rival — 2014-10-09
• Druid, e.g. — 2014-04-12
• Bill Russell or Larry Bird, briefly — 2014-01-08
• Boston player, for short — 2012-12-23
• Gaelic speaker — 2012-08-07
• Hibernian, for one — 2012-05-14
• European of the Iron Age — 2012-03-25
• Bird, e.g., once — 2010-12-24
• Boston cager, briefly — 2010-11-23
• Invader of Rome in 390 B.C. — 2010-09-24
• Knick rival — 2007-06-13
• Knick rival — 2006-08-13
• Boston cager, informally — 2004-02-09
• Druid, for one — 2003-12-31
• Irish native — 2003-10-13
• Bygone Briton — 2003-04-03
• Saxon foe — 2002-09-27
• Irishman, e.g. — 2002-06-27
• Gael, for one — 2002-06-23
• Irishman or Welshman — 2001-10-02
• Boston player, for short — 2000-12-26
• Boston player, informally — 1999-09-01
• Northwest European — 1999-02-23
• Breton, for one — 1997-06-03
• Stonehenge builder — 1996-12-08
• Scot, for one — 1996-10-23
• Welshman or Scot — 1996-09-23
• Scot or Breton, e.g. — 1996-06-18
• Boston athlete — 1994-04-28
• Cornishman — 1994-01-06
• Druid, e.g. — 1993-12-28