Combine first 3 ingredients in a small bowl; let stand while preparing cake batter.
Lightly spoon flour into dry measuring cups; level with a knife. Combine flour and next 6 ingredients. Combine brown sugar, buttermilk, oil, and eggs. Gradually add flour mixture to buttermilk mixture, beating with a mixer at low speed until blended. Stir in figs and any juices remaining in bowl.
Spoon batter into a 13 x 9-inch baking pan coated with cooking spray. Bake at 350° for 25 minutes or until a wooden pick inserted in center comes out clean. Cool completely in pan on a wire rack.
Combine powdered sugar, 1/2 teaspoon orange rind, and 4 teaspoons fresh orange juice. Drizzle over cake.