Combine gin, raspberry syrup, and fresh lemon juice in a cocktail shaker.
Add the egg white and dry shake (without ice) vigorously for 10–15 seconds to emulsify.
Add ice and shake again hard for a further 10–15 seconds until well chilled.
Double-strain through a fine mesh strainer into a chilled cocktail glass.
Garnish with fresh raspberries on a pick.
Always dry shake egg white cocktails first without ice to properly emulsify the protein - this produces a denser, more stable foam. A second hard shake with ice then chills and dilutes the drink without collapsing the froth.
My Bar Shelf reads your shelf and shows you every cocktail you can make from what you already own, including Clover Club.