Historical clue formulations

• One of two, in this clue — 2025-03-02
• Poetic foot with a "dun-dun-DUN" rhythm — 2024-09-29
• Three-syllable foot, as in "bada-bing" — 2017-11-20
• Standard part of a limerick — 2013-05-26
• One of four in "'Twas the night before Christmas, when all through the house" — 2012-03-08
• "Au revoir," for example — 2011-04-29
• "In the Mood," e.g. — 2009-09-26
• Bit of a limerick — 2009-02-11
• Pattern in prosody — 2005-03-05
• Short, short, long — 1995-02-16