Royal Clover Club

Here's an oddball with something of a pedigree. It's named for the Clover Club of Philadelphia, a private gentlemen's club that served that city's captains of industry from the late 1800s up to about the time of Prohibition.

There's the original Clover Club Cocktail which uses an egg white, and then this "royal" version that uses the egg yolk, and this one uses lime juice instead of lemon juice. Both call for raspberry syrup, but grenadine is an allowable alternative.