Reassign class variable to a blank instance of its class

When I declare a class variable

private var myVar:MyClass = new MyClass();

It creates a new instance of that class that will trace as [Object MyClass].

However, as soon as I assign it to something

myVar = thisOtherVar;

It will now trace as [Object thisOtherVar].

I need to get it back to where it’s just an “empty” blank class instance, if that makes any sense at all.

How do I go about doing that? Thanks!