Acquire and use them on the Ender Girl character.
A cross-reference of gaming databases and achievement trackers (Steam, Xbox, PSN) yields the following: no clip achievement lovely craft
But for the restless few—the ones who push against every barrier, who distrust the path, who believe that beauty lies just beyond the render distance— No Clip is a validation. It is proof that in a world of scripted events and guided tours, a little bit of chaos remains. Breaking the Boundaries: How the “No Clip Achievement”
These are used on specific characters, often the Enderwoman. Break the Beads: Phase through the glass dome protecting the room
You aren't breaking the game. You are completing it.
: Make the creeper explode by reaching max heart levels.