Historical clue formulations

• "Y"-sounding pair of letters, in Spanish — 2026-08-25
• Legal boundaries? — 2026-05-21
• Fulfillment center? — 2026-04-04
• Ernie who has won the British Open twice — 2026-04-02
• Sports great Ernie known as "The Big Easy" — 2026-03-12
• Enrollment center? — 2026-02-11
• Chicago trains — 2025-12-29
• Llama's head? — 2025-10-15
• Liverpool's borders? — 2025-09-14
• Trains above street level — 2025-09-07
• Trains for the Chicago White Sox? — 2025-08-07
• High ways — 2025-06-21
• Chicago trains — 2025-03-17
• Chicago high rails — 2025-02-10
• Pairs of jolly bells? — 2024-12-25
• Chi-town trains — 2024-12-09
• What always ends well? — 2024-11-02
• Chicago trains — 2024-10-30
• Hollow center? — 2024-05-01
• Leads of "La La Land"? — 2024-04-25
• Volleyball doubles? — 2024-04-05
• Trains above street level — 2024-02-18
• Trains that run to O'Hare airport — 2024-01-16
• High ways? — 2024-01-12
• They're raised in Chi-Town — 2024-01-10
• Chicago trains — 2023-12-25
• Half full? — 2023-12-15
• Chicago trains — 2023-08-22
• Features of lollipops but not suckers? — 2023-06-27
• Rapid transit options — 2023-06-08
• Chicago trains — 2023-01-09
• Transports from Midway Airport to the Loop — 2022-10-30
• Trains at a high level? — 2022-10-18
• Chicago trains — 2022-07-07
• Chicago trains — 2022-06-06
• High rails — 2022-04-15
• Local borders? — 2022-01-29
• Chicago trains — 2021-10-13
• Two in a million? — 2021-10-10
• Pair seen three times in "All's Well That Ends Well" — 2021-10-02
• Hollow center? — 2021-03-28
• Llama's head? — 2021-03-21
• Loop loopers — 2021-03-17
• A couple of dollars? — 2021-02-27
• Many characters in "Kill Bill" — 2021-02-06
• Chicago trains — 2021-02-03
• Golfer Ernie — 2021-01-26
• They loop the Loop — 2020-12-08
• Golfer Ernie — 2020-11-22
• They're high up in Chi-Town — 2020-11-13