Preheat oven to 325 degrees F. Generously grease a 10-cup Bundt pan or 10-12 mini Bundt pans.
For the cake - cream the butter and sugar together until light and fluffy in the bowl of an electric mixer fitted with the paddle attachment. Add the eggs, molasses, White Fig Spread and vanilla and mix well. Scrape down sides of bowl if needed.
In a separate bowl combine the flour, baking powder, salt, baking soda, cinnamon, ginger, nutmeg, allspice and cloves. Use a whisk and mix.
Add the flour mixture alternately with the buttermilk starting and ending with the flour. Mix on low speed until just combined. Gently fold in the raisins. Pour batter into prepared pan. Bake for 50-60 minutes (or about 20 minutes for mini Bundt pans) or until a toothpick inserted into the center comes out clean. Remove from oven and place on a cooling rack for 10 minutes. Remove from pans.
For the Rum Sauce - melt the butter over medium-low heat. Add the sugar and stir until it is dissolved. Whisk in the half & half, nutmeg and vanilla. Remove pan from heat source and add the rum. Return sauce to the burner and heat until the sauce has thickened.