The type of food we eat influences the health and fitness of our body. Which is why, eating healthy does not only mean that we skip out on food items that might be unhealthy but might also contain various essential nutrients. Clean eating means that we substitute these kinds of foods with food that have the same nutrients as these minus the bad part.
For instance, you could always swap out condiments such as mayonnaise and ketchup for spices which have zero calories and are also a source of antioxidants. Spices are actually a good way to add flavor to your food and also improve your health at the same time.
There are ofcourse other things that you should look into swapping such as you can use non-fat Greek yogurt in place of both sour cream as well as canola oil.