Historical clue formulations

• Genre heard at many raves, for short — 2025-05-09
• The N.H.L.'s Oilers, on scoreboards — 2024-07-07
• Techno is a subgenre of it, for short — 2018-03-22
• Genre for much Top 40 radio, for short — 2016-09-07
• Teacher's deg. — 2009-10-30
• Teacher's deg. — 2006-07-14