Historical clue formulations

• Something that good speakers make with audiences — 2023-03-31
• Something to maintain during a conversation — 2022-11-21
• Asset for a public speaker ... or a hint to 17-, 24-, 37- and 52-Across — 2018-04-16
• Aid for establishing rapport — 2017-10-27
• *What a good speaker maintains with the audience — 2014-12-29
• Orator's asset — 2002-06-08
• Speaker's asset — 2000-06-24