Clock Out is a slightly tart cocktail made with White Wine, Dry Vermouth, Peach Flavored Schnapps, Lemon Juice, and Tonic Water. The white wine and dry vermouth give the Clock Out its tartness, while the peach schnapps and lemon juice add a touch of sweetness. The tonic water gives the Clock Out a refreshing finish. The history of the Clock Out cocktail is a bit of a mystery. It is believed to have originated in the United States sometime in the early 1900s. The exact origins are unknown, but it is thought that the drink was created as a way to use up leftover wine that was not suitable for drinking. Whatever its origins, the Clock Out cocktail has become a popular summertime drink in recent years.