While using VBA, currently what you need to do to clear a powerclip shape is actually "pretend" to use the right click Frame type ==> Remove frame command, since there is no built-in way to do it.
It looks like this:S.CreateSelection
'Thanks, Shelby!
Application.FrameWork.Automation.Invoke "7b022531-3cd7-487f-a797-9d80179dc821"
DoEvents
This breaks any undo groups and makes a massive mess for anything more than a shape or two. PLEASE add a proper macro command to deal with this. Sounds like it should be quite a simple task as well.
Thanks!