Wedge-shaped clip

I’m not sure implementing this is very easy. The way clip works, you are likely to get errors at the point of the wedge, especially for acute angles. Also, manipulating this would suggest a whole new 3D widget, which would not be trivial to implement.

As @utkarsh.ayachit said, using a sequence of a cylinder clip and two plane clips would give a more accurate wedge clip than trying to do it all at once.