French cocktail made with crème de cassis

KIR

This classic apéritif is often served in a white wine glass and named after a beloved post-WWII mayor of Dijon.

This clue points to "KIR," a classic French aperitif that mixes white wine with crème de cassis, a sweet blackcurrant liqueur. The name comes from Félix Kir, a former mayor of Dijon who popularized the drink in the mid-20th century. It’s a straightforward definition with no wordplay—just a direct reference to the cocktail’s key ingredient and origin. If you’ve heard of a kir royal, that’s just a fancier version with champagne instead of wine.