Completely delete/crop/cut everything that doesn't fall within a clipping mask

A novice question.

I need to crop and delete all the artwork that doesn't fall within a clipping mask. Please, don't suggest Command+7, since it just hides artwork that doesn't fall within the mask.

What I need - crop and delete everything that is outside. Then, save to another vector file (not necessarily .ai, .svg may work too).

All my artwork is just lines, no raster. I need this for laser cutting.

The only thing I can find on the internet is Cmd+7 which does not work for my case (laser reads all the layers and all the artwork lines).

Thanks,