Historical clue formulations

• With deadpan delivery — 2022-07-18
• Deadpan — 2021-12-04
• In a deadpan manner — 2016-09-14
• With no sparkle — 2014-03-14
• How deadpan jokes are delivered — 2006-10-10
• Sans spice — 2006-04-07
• Without any pizazz — 1997-12-07
• Sans elan — 1994-02-18