Hi
Check out using Templates with Placeholders. The templates (which are vpj files) are projects that have a placeholder object added and once saved they can be loaded to an existing open project. In effect you are adding two projects together. The template would be your edit clip (with placeholder) saved via the Templates tab on the Home toolbar. You can then load your new project and add the template to it. It's a bit complicated to do the first time around but try it out with something simple like 2 - 3 clips and you will be able to grasp the principle.
Note: These are not the templates mentioned by Borate which are something different but NCH have used the same terminology.
Nat