circle crop

You've placed this in the X3 and older section, so this might not apply for anyone who has a version that old, but for X7 the best option to crop an object to a circle (or any other shape for that matter) is to place it in a PowerClip.

1. Create a circle (or any other shape)
2. Select the object you want to crop
3. Object > PowerClip > Place Inside Frame
4. Then click on the shape you want to crop the object to
5. If the object isn't inside the frame you can go Object > PowerClip > Center Contents (or one of the other placement options)