I'm always skeptical of terms like "healthy" or "clean". It seems that besides sugar being bad, we can't really agree on anything in nutrition. It's because it's almost impossible to do science* in nutrition. There are just too many variables, and we are finding more variables as we go on and learn that both our foods and our bodies are made of smaller and smaller component parts.
I just try not to go overboard on the booze or the calories. I think it's easier to avoid the obvious bad stuff than it is to optimize.
*The kind of science where you hold ALL variables except for one constant and measure changes.