Shake, strain, up, garnish.
1) Clémént cane syrup is lightly spiced with vanilla and cinnamon, among others. Donn's spices diluted in unflavored cane syrup would work similarly. 2) If using aged agricole, switch the citrus to lemon.
Adaptation of the Barbaresque (1929), a simple 2:1 mix of rhum agricole and Cointreau with a lemon twist.