Venison in Red Wine Casserole - With poultry

1 (5 -6 lb) venison roast 3 cups dry white wine 1 large onion , thinly sliced 12 black peppercorns 12 whole cloves 6 whole allspice 1 bay leaf 1/4 teaspoon[...]

2 tablespoons sunflower oil 2 lbs venison, cubed shoulder 2 tablespoons flour 2 onions , chopped 2 celery ribs , sliced 1 (750 ml) bottle red wine 1 beef[...]