Cut 1 garlic clove in half.
Rub cut sides on outside of chicken; place garlic in chicken cavity.
Sprinkle half the tarragon in chicken cavity.
Truss chicken with string and place in roasting pan.
Mince remaining garlic and combine with remaining tarragon, wine and oil; drizzle over chicken.
Roast in 350°F/180°C oven, basting frequently, for 1 1/4 hours or until juices run clear when chicken is pierced with fork.