How to cut off excess in illustrator?

Question

Design

The part that is highlighted needs to be cut off, but I don't understand how

Answer 1

One option: select everything and press divide on the Pathfinder panel (in Russian "Pathfinder"),
the selected objects will be cut at all mutual intersections

Or you can make a copy from a black object and use it as a mask (Clipping Mask) for all objects, then the green ones will remain whole
UPD: Artmertehin 's answer is better

Answer 2

select objects and Shape builder tool + alt

Answer 3

binary operations.

Answer 4

In a simple and safe case, this is a clip mask