Historical clue formulations

• Like a good explanation, say — 2026-07-08
• Cloudless — 2025-06-09
• Uncomplicated — 2025-03-12
• Easy to understand — 2024-12-12
• Exclamation in hospital dramas — 2024-06-01
• E.R. shout — 2024-01-14
• Transparent — 2022-12-16
• Cloudless — 2022-10-26
• Unblocked — 2022-06-25
• Pellucid — 2022-01-25
• Obvious — 2020-06-25
• Cloudless — 2020-02-17
• Perfectly understood — 2020-01-14
• Unambiguous — 2019-12-09
• Pre-defibrillation cry — 2019-09-05
• Cloudless — 2018-11-26
• Intelligible — 2018-10-05
• Nice forecast — 2018-05-06
• Not nebulous — 2017-07-09
• Cloudless — 2016-10-25
• Like mud, in an idiom — 2016-03-15
• Cloudless — 2015-08-24
• E.M.T.'s cry — 2015-04-23
• Calculator button — 2015-01-02
• E.M.T.'s cry before using a defibrillator — 2014-01-28
• Like crystal — 2013-07-03
• Like a bell — 2012-11-02
• Cloudless — 2012-04-22
• Cloudless — 2010-11-15
• Like good explanations — 2010-10-02
• Transparent — 2010-08-24
• Net — 2010-06-29
• Cloudless — 2010-06-09
• Easy to understand — 2010-01-25
• Cloudless — 2009-11-16
• Find innocent — 2009-09-09
• ___ as a bell — 2009-04-28
• With 64-Across, words that can precede the starts of 18-, 31-, 38- and 55-Across — 2008-12-04
• Word that may go before 42-Across — 2008-10-08
• Welcome forecast — 2008-04-16
• Not pimply — 2007-05-23
• Cloudless — 2007-01-22
• Free from confusion — 2005-07-06
• Microwave button — 2005-02-19
• Unclogged — 2003-08-06
• Brighten up — 2003-03-20
• Unmistakable — 2002-11-15
• Like a good day for a picnic — 2002-10-19
• Cloudless — 2000-11-15
• "C" on a calculator — 2000-10-03