Mix butter, 1/4 cup mustard, rosemary and pepper in medium bowl until blended; stir in 1/4 cup orange juice. Reserve 1/4 cup mustard mixture for making the gravy; refrigerate until ready to use.
Pour remaining orange juice into turkey cavity. Loosen turkey skin from meat; rub 1/4 cup of the remaining mustard mixture under skin, then rub additional 1/4 cup of the remaining mustard mixture over outside of turkey.
Place turkey, breast side up, on rack in roasting pan. Insert meat thermometer into thickest part of one of the thighs, being careful to not let thermometer touch the bone. Add 1 cup wine to pan.
Bake 1 hour, brushing with remaining mustard mixture after 30 min. Cover turkey loosely with foil. Continue baking 2 to 2-1/4 hours or until meat thermometer registers 165°F, stirring remaining wine, 1/2 cup at a time, into drippings in pan as necessary to prevent them from burning.
Transfer turkey to cutting board, reserving drippings in pan; cover turkey with foil. Let stand 20 min.
Meanwhile, pour pan drippings into large measuring cup; skim off fat. Add enough of the remaining wine to drippings to measure 2-1/2 cups; set aside. Add reserved mustard mixture to roasting pan; cook until heated through, stirring frequently. Gradually add flour, stirring constantly with whisk until blended. Cook on medium heat 1 to 2 min. or until thickened, stirring constantly. Add pan drippings; stir until blended. Cook 2 to 3 min. or until gravy thickens and begins to boil. Stir in remaining mustard.
Slice turkey. Serve with the gravy.