[Inkscape-user] Creating a mask

Hi,

I have created a stylized Christmas tree from a series or arcs, and tree straight lines forming the stem. With Paths -> combine I've combined these paths to a single path.

All this forms a layer, and on a layer underneath is a picture.

What I want is to create a mask from the Christmas tree, so that only that part from the picture that is within the Christmas tree is visible.

From Tamjongs course I learned that it is clipping that I need, but I cannot find that in my Dutch translated Inkscape (.47 and .48), and also masking (that should do the inverse if I'm correct, that is, only that nót within the Christmas tree becomes visible) doesn't seem to do anything.

Can someone help me out?

Thanks!

regard, Jogchum