Comment 7 for bug 1668116

You can do this, actually.

1. Create a clip so that all objects inside the clip is grouped (there's the preferences' option for creating a group for clipped objects automatically).

2. Then open "XML Editor...", select your new clip on the canvas and press "Unindent node" button in the editor. You can close XML editor after this operation.

3. Now, to make a layer from a group, go to "Objects..." dialog and click on the "Layer/Group" icon (third column under the name "T") next to your clip object.

If you open the "Layers..." dialog you should see a new separate layer for your clipped group and everything that will be drawn in it will be clipped by original clip object.

To edit a clipping path you must convert the layer to a group back by clicking on the same "Layer/Group" icon in the "Objects..." dialog.