For the Pecan-Streusel Filling
1 1/2 cups packed light-brown sugar
1 tablespoon ground cinnamon
Pinch of ground cloves
1/2 cup granulated sugar
1/2 cup all-purpose flour
1/4 teaspoon coarse salt
1/2 cup (1 stick) unsalted butter, softened
1 1/2 cups coarsely chopped pecans
For the Cake
Nonstick cooking spray with flour
2 1/2 cups all-purpose flour
1 teaspoon baking soda
1 teaspoon baking powder
1/4 teaspoon coarse salt
10 tablespoons (1 1/4 sticks) unsalted butter, room temperature
1 cup granulated sugar
3 large eggs
1 teaspoon pure vanilla extract
1 1/4 cups sour cream
2 1/2 cups sifted confectioners' sugar
1/4 cup milk