Arrange onion wedges and parsnips in bottom of slow cooker. Season beef all over with salt and black pepper. In a small bowl, combine coriander, cumin, cinnamon, garlic powder, and nutmeg. Rub spice mixture all over beef. Arrange beef over onions and parsnips in slow cooker. Arrange apricots around beef.
In a small bowl, whisk together wine, broth and honey. Pour mixture over beef and vegetables. Cover and cook on LOW for 6 to 8 hours or HIGH for 3 to 4 hours.
Cook couscous according to package directions. Serve beef, vegetables and apricots over couscous. Pour over extra sauce from slow cooker and top with cilantro.