What is the origin of the idiom "clear one's name" and when to use it?

In medieval Europe, one's reputation was highly valued, and being accused of a crime or wrongdoing could result in being excluded from society, loss of property, or even execution. This made it very important to prove one's innocence and restore one's reputation. As a result, people would often put in a lot of effort to show that they were not guilty of the accusations against them. Today, the idiom "clear one's name" is commonly used to describe any situation where someone is trying to restore their reputation or prove their innocence in the face of accusations or doubts.