Shake with ice the lemon juice, Benedictine, and gin. Pour the Cheerwine soda into the shaker and give it a light stir or two. Strain into good sized rocks glass.
Cheerwine is a cherry soda originally from North Carolina - first made in the 1917. I wanted to modify a cocktail that called from some sort of cherry liqueur *and* had seltzer or soda water and the "#1" Singapore Sling recipe from 1937 fit that bit. Cheerwine isn't nearly as cherry-tasting as I'd recall so I may remake with some Cherry Heering or just some of the Maraschino cherry syrup stirred in. Or just garnish with a cherry.
"Cheerwine is a cherry-flavored soft drink produced by Carolina Beverage Corporation of Salisbury, North Carolina. It has been produced since 1917, claiming to be "the oldest continuing soft drink company still run by the same family"" - from Wikipedia