Eating "clean" essentially means none of Munchie's cookies, chips, crackers, almost all processed foods, etc.
The cornerstone of clean food is FRESH veggies, fruits and meats that are prepared in my (ok, my hubby's) kitchen. How fresh do you think the lettuce is at your local restaurant?
As I am not a believer in the "low-carb" diet, I have to pay strict attention to my fat intake, as well (a severe curtailing of most pork, for example). I work too much and too hard to deprive my body of the required carbohydrates to perform. (The "low-carb" diet, oversimplified, is the theory that fat clings to carbohydrate, so if one's carb intake is down, one can consume more fat and not have it solubolize and accumulate) And I have to keep the protein level cranked to build and maintain muscle.
Yawning, yet?