Try a Hanky Panky, It's Not What It Sounds Like

A Hanky Panky is a cocktail (apparently) that I had to research for a recent event. 
​I was nervous about this one. If you're a normie, don't try this. 

1/4oz (7ml) Fernet
1.5oz (45ml) Sweet Vermouth
1.5oz (45ml) Gin
STIR - because it's clear
Julep strain into coupe