Finishing that arc in the clean may be the banging you experience.
I teach my students the clean by thinking about going up.
Redirecting the weight from out to up rather than focusing on the arc, as I find that the arc thinking leads to banging (even with people training for years). The arc leads to going from back, to out, to in, rather than from back, to out, to up and somewhat in.
The kettlebell coming in leads to impact. The kettlebell going up leads to a catch and land.
Your thoughts?