I don't think that there is a shortcut for closing the clipboard because it
appear on the Task Pane window. However, you can close the Task Pane by
pressing Ctrl+F1 and again to re-activate it.

Let us know if this was helpful to you.

"George" wrote:

I've configured the clipboard to appear only when I press Ctrl+c twice.
Can I close the clipboard with a keyboard shortcut?