Interrupt a Slakebeast with Drax's Call to Action.Chapter 3
During this chapter you will fight against a large beast with a tentacle face (pictured below), and then later in this chapter you will face off against two of them.
As with all of the achievements for interrupting an enemy with a specific character's Call to Action, you need to weaken the enemy and fill up their Stagger meter. The best abilities to stagger enemies are Drax's abilities and Quill's Eye of the Hurricane ability. Once they are staggered, you will get a prompt while looking at them. Do so, and one of your allies will do a Call to Action. You unfortunately have no control over which ally attacks, so if it isn't Drax for this achievement, you can reload your checkpoint to try again.