Avoiding clinch is a much harder skill to develop then clinching.

If you are trying to hit someone, and he is trying to hit you, you will be fighting at clinch range.

If you are trying to hit, and he is trying to clinch or ground fight, then you will fight at clinch range.

Unless you run away, out the door, over a fence, and into a car and drive away, you will fight in clinch range.

Or goto some sporting event that forbids or highly regulates what can happen in clinch range.

You probably cannont name any methods or styles or familys that dont fight or train fighting at clinch range, no matter what they call it.