I am definitely not a big fan of the word clean combined with the concept of eating. Automatically tells you that if there is a clean way of doing it, there must be a dirty/bad one as well. And classify food as bad or good is the creation of a mental struggle since the beginning. Sensitive minds can be influenced by this concept and take it too far, avoiding the bad foods like they would be poisonous and kill them at the first sniff or feel ashamed for even thinking of eating them, making even a point of honour their talent of deny themselves to consume those foods.
Food classification can lead to Orthorexia and dramatic eating disorders. Food banning can lead to Orthorexia and dramatic eating disorders.