In my opinion, the term "clean" is abused. Being clean is having a solid color car, not mismatched bullsh*t, having a straight body meaning no dents and dings, no grass or stains on the carpet or seats for that matter, and having quality parts (no knock off crap).

My car for instance, I have paper and extra mats covering my floor mats, plastic covering my carpet underneath, always used OEM parts and won't settle for less, and saving for a little longer just so I can get the REAL DEAL not the fake crap. This is just me and my opinion, so what's clean to me might not be the same for others.

A prime example of "Clean" would be SMRlsvtec. You don't have to be baller to do this, just save up for a little longer and get the original instead of being cheap and buying the knockoff, it's all about self-preference.