Clean eating places fairly substantial food restrictions on individuals. Clean eating diets require that people consume only whole, natural foods and eschew everything that is processed. This excludes pastas, breads, crackers, chips, cereals, and anything else that has been processed. This approach also excludes things like condiments (mustards and spreads) as well as dressings. Additionally most beverages are restricted; this includes alcohol, soda, and juice.
Clean eating is best suited for people who are focused on the health properties of food, do not feel the desire to track the calories in their food, and who do not mind fairly restrictive approaches to nutrition. Clean eating allows substantial flexibility in the amount of food one eats, the timing and frequency, and with some effort and diligence the diet can be used for a wide range of people with drastically different goals (fat loss, muscle gain, or sport performance).
Aidn's Fitness Blog 