1/2 oz Suze Gentian Liqueur
3/4 oz Lustau Amontillado Sherry
1/2 oz Citrus Cordial (*)
Shake with ice and strain into a rocks glass containing an orange wheel and filled with crushed ice. Add a straw.
(*) Sub triple sec in a pinch. See this post that includes a recipe for a grapefruit cordial the bar manager used to make while at Craigie on Main and perhaps sub lemon and lime.