This is a pretty sensitive topic for me so I'm going to apologize in advance if I go off on a rant here! I meet people all the time that claim to eat clean or eat healthy and when I go to their house or have discussions about what they eat, most of it is processed junk. I know it's hard to get away from all of the junk when just about every food manufacturer pumps all of the food you find in the grocery store with processed crap like hydrogenated oil, HFCS, trans fat, etc. Everything claims to be healthy, get your fiber here, made with whole grains, fortified with vitamins, full serving of fruits. It makes me sick to read labels on food claiming to be healthy only to find that it's not. HFCS is in just about everything on the shelves these days. So how does one eat healthy? The obvious answer is to shop the outer area of the store and stay away from the inner isles. Or shop at a store like whole foods that doesn't carry anything made with those ingredients. Now, just because you buy something at whole foods, doesn't mean it's "good for you", it just means it's less processed. Bottom line is, read the labels!!! If you can't pronounce it, don't eat it. And as far as meat and produce are concerned, you really should try to stay away from your big names like Purdue and Tyson that pump their birds full of antibiotics. Again, read the package and if it doesn't say "raised w/out antibiotics" you can be sure they are in there. And produce, if it's not organic, it was likely grown with pesticides so try to avoid non-organic if you can, especially apples as they are grown with the most.
To sum up "clean eating" I would recommend you eat foods similar to what is listed below and limit your intake of anything else:
Veggies (lots of them)
Fruits (1-2 per day)
Lean meat (4-6 oz at every meal - fish, chicken, turkey, lean beef)
Dairy (unsweetened soy milk, non-fat milk, plain non fat greek yogurt)
Other protein sources (eggs, beans, etc.)
Good fats (olive oil, raw nuts, avocados, fresh ground or natural PB<peanuts being the only ingredient>)
Whole Grains (old fashioned oatmeal, steel cut oats, brown rice, quinoa, whole wheat pasta)
packaged snack options: reduced sodium turkey jerky, tuna in water, low sugar protein bars like quest or think thin.
Water (drink at least 8 glasses per day)
Keep in mind "limit" your intake doesn't mean you can't ever eat anything else, it just means it should be done in moderation and remember that eating poorly will keep you one step further away from your goals.
I'm sure I have forgotten to put some great foods on this list, but you get the idea!!