removeEventListener from another Class

In a class called Rebound in my constructor I have this addEventListener:

this.addEventListener(MouseEvent.MOUSE_UP, selecting);

Then in another class called Grid I have a public function called placer

In placer I want to remove the event listener for selecting in the Rebound class

Both the classes extend movieclip and are linked to different movieclips.

How do I do this?

Any help is much appreciated.