Command: EXTRIM
Pick a POLYLINE, LINE, CIRCLE, ARC, ELLIPSE, IMAGE or TEXT for cutting edge...
Select objects: Select an object to define the cutting edge
Pick the side to trim on: Select a point inside or outside the object (objects are trimmed to objects cutting edge)

Usage Example:
Draw several overlapping circles with intersecting lines. Specify an internal point for location of the trim.

Select a circle to define the cutting edge:

Specify a point inside the circle:

Objects trimmed to the edge of the circle: