For the 100th time i will say it. you will never grow on clean diet. NEVER! no matter how much hormones you take
Not true.
A clean diet provides all of the nutrients necessary for maximal muscle growth. The clean diet needs to be diverse and well rounded ... I agree that simple chicken/rice won't suffice. Meat, Simple and Complex Carbohydrates, Fruit, Vegetables, Milk, and Fats are the requisite elements.
Ultimately, its difficult to consume the sheer number of calories necessary to grow with only clean food options, but it is still entirely possible with enough time and discipline. If you are implying that the sort of stuff a clean diet lacks (such as trans fat - which may interfere with amino acids - or high fructose corn syrup - the worst carbohydrate source, completely bypasses the muscle and is stored as liver glycogen, once liver glycogen stocks are full the body begins to accumulate bodyfat) is necessary to gain size, then you are dead wrong.