In a large pot, cook bacon and onion over medium heat, stirring occasionally until bacon is cooked and onion is tender.
Add flour and stir constantly for 1 minute.
Drain clams, reserving liquid, Add enough water to clam liquid to measure two cups.
Stir clams, clam liquid, potatoes, salt and pepper into bacon and onions. Heat to boiling and then reduce heat. Cover and simmer about 20 minutes or until potato is tender.
Stir in cream. Heat, stirring occasionally, just until hot.