Why Does Clear Mean Fresh?

We all know that clear is a word that is used to describe something that is easy to understand and it is not causing any kind of confusion. The term can also be used as a verb to describe the phenomenon of removing something that is not needed on that particular place. It is this use of the word that prompts people to use the word as a synonymous term for the word fresh.
      
When you are making something fresh you are removing all the things that are unwanted and giving the object a new identity. So in this context the term can be used to convey the idea of freshness. The tern has its use to describe facial expression also and you can use it when you intend to convey the idea of the removal of the worried look from the face of somebody.