Historical clue formulations

• Obscure — 2025-06-29
• Obscure — 2022-02-20
• With this puzzle's central black squares, ecstasy — 2020-12-22
• Make murky — 2020-12-19
• Bringer of rain — 2019-09-10
• ___ 60-Across (state of euphoria) — 2017-12-20
• Kind of computing — 2017-01-15
• Kind of computing using remote servers — 2011-11-30
• Rain source — 2008-12-29
• Cirrus or cumulus — 2004-03-29
• Sun block? — 2002-10-03
• Symbol of a lingering scandal — 1999-11-24