In a large bowl, combine the water, vinegar, cloves, bay leaves, salt and brown sugar. Remove 2 cups to a small bowl; cover and refrigerate. Add roast to large bowl with remaining marinade; turn to coat. Cover and refrigerate for 1-2 days, turning twice each day., Discard marinade and spices from large bowl. Pat roast dry; dredge in flour. In a large skillet over medium-high heat, brown roast in oil on all sides. Transfer to a small roasting pan. Add the onion, carrots, celery and reserved marinade. , Cover and bake at 325° for 3 to 3-1/2 hours or until meat is tender. With a slotted spoon, remove meat and vegetables to a serving platter. Strain cooking juices; thicken if desired.