Clam Bisque

10 ounces minced clams
1/2 cup finely chopped celery
3 tablespoons butter, divided
2 tablespoons flour
1 cup milk
Clam juice
1 cup chicken broth
1 cup mashed potatoes
1/4 teaspoon pepper
1/4 teaspoon salt
1 teaspoon parsley
1 teaspoon grated raw carrot

Drain clams; save juice.

Saut