Preheat oven to 325°F (165°C). In a bowl, toss crushed gingersnap crumbs, melted butter, 2 tablespoons sugar, and 1/4 tsp cinnamon until moist. Press firmly into the bottom of a 9-inch springform pan. Bake for 10 minutes, then cool completely.
In a large bowl, beat softened cream cheese, granulated sugar, and light brown sugar on medium-low speed for 2 minutes until silky smooth, scraping down the bowl.
Add pumpkin purée, sour cream, vanilla extract, cinnamon, ginger, nutmeg, cloves, sea salt, and all-purpose flour. Beat on low speed just until seamlessly combined.
Add the eggs and egg yolk one at a time, mixing on the lowest speed just until incorporated. Do not overmix.
Wrap outside of the springform pan securely in heavy-duty foil. Pour batter over the crust and place into a large roasting pan. Pour boiling water halfway up the sides of the pan.
Bake at 325°F (165°C) for 55 to 60 minutes until edges are set and center has a gentle gelatin-like wobble.
Turn oven off, prop door open with a wooden spoon, and let cheesecake cool inside for 1 hour. Remove, cool to room temp, and refrigerate for at least 6 hours (preferably overnight). Slice and top with whipped cream!