This is a riff on the classic Aviation cocktail (gin, Luxardo Maraschino Liqueur, crème de violette, lemon juice), but dropping the sweet, floral violette and adding the more herbaceously floral (and health-giving!) notes of elderflower liqueur. 

THE ELDER AVIATOR
2 oz Gin (good stuff, please)
⅔ oz St. Germain Elderflower Liqueur
¼ oz Luxardo Maraschino Liqueur
½ oz Freshly squeezed lemon juice

Combine all the ingredients in a shaker, shake with ice until well chilled, and strain into chilled Martini glass. Garnish with twist of flamed lemon peel.