Can I delete everything outside of a clipping mask?
Please refer to image attached. It doesn't have to be a clipping mask, but it's the easiest way to explain what I need. I can use that rectable and make a clipping mask no problem, but what I want to do is delete everything else. I've tried to use the all the pathfinder tools without success, both before and after making the clipping mask. The contour lines are just paths. I've tried grouping them, making a compound shape but I am just not getting the result I am looking for. 
