From what I have read eating clean is more about lean protiens (salmon, turkey, chicken, filet if you have to have beef), fresh vegetables, egg whites and fruit (natural sugar). Also fiber like oatmeal and yams. You can still have pasta but it should be whole wheat. It's very much a lifestyle change, not just a diet.
I know it gets very confusing, I am a fan of Oxygen magazine, since no one thoroughly explains what "clean" is.