Historical clue formulations

• Spanish sparkling wine — 2026-09-25
• So-called "Champagne of Spain" — 2026-06-05
• Drink similar to Champagne — 2024-12-13
• Spanish sparkling wine — 2024-02-28
• See 31-Down — 2019-09-24
• Vena ___ (major vessel) — 2017-09-20
• Spanish sparkling wine — 2011-11-01
• Vena ___ (passage to the heart) — 2011-10-31
• Vena ___ (blood line to the heart) — 2010-02-09
• Anatomical term that's Latin for "hollow" — 2006-10-28
• Vena ___ — 2000-08-20
• Vena ___ (vessel to the heart) — 1998-08-12