Motion Guide Under Mask. How?

Here’s my problem. I want to have a circle move on a circular path using a motion guide but the same circle must also be masked. Is there a way to do this without having to hand animate a circular (or irregular) path? :puzzled:

Thanks in advance.

Paddy

Make the circle animation as one movieclip, then put that MC on another clip and mask it.

Wait! What? On another movieclip? In it? Put the second one on the layer above? Could you explain in more detail?

Thanks Thoriphes.