In 10-inch ovenproof, nonstick skillet, combine cranberries, raspberry spread, 1 tablespoon of brown sugar, orange zest, and orange juice. Bring to a boil over medium-low heat, reduce to a simmer, and cook, stirring frequently, 7 minutes or until berries have popped and sauce is thick.
Meanwhile, in a large bowl, stir together cornmeal, flour, baking powder, baking soda, salt, and remaining 3 tablespoons brown sugar. In measuring cup, combine buttermilk, oil, and egg. Make well in center of dry ingredients, pour in buttermilk mixture and stir to combine.
Pour cornmeal mixture over cranberries. Bake 20 minutes or until knife inserted in center comes out clean. Cool 5 minutes in pan, then invert onto plate, scraping any berry mixture that sticks to the pan on top of cornbread. Serve warm or at room temperature.