Delete a clip from Clip Organizer
Select the clip you want to delete.
On the Edit menu, click Delete from Clip Organizer.
Note: This action removes the clip from the collection. The clip remains available online or in the Office collection.
Delete a collection of clips from Clip Organizer
In the collection list, click the collection you want to delete.
Right-click the collection, and then, on the shortcut menu, click Delete "Collection Name".
Note: You can delete the collections you've created, but you cannot delete read-only collections of clips that come with Microsoft Clip Organizer.