Did you not read the story properly? Her death sentence was accelerated but stopped in time. No one has any more means to wish for her death now that Lysander is no longer being controlled by his mother and she is imprisoned. Clarisse is free to live as she pleases as the Duke and Duchess' adopted daughter.
She was sentenced to be killed in chapter 100, then we see the scene in chapter 101 where she was about to die but it was stopped because Lysander and the rest made it in time to get the last person the truth she needed to know. And it was the Empress Dowager and in chapter 103, she finally knows truth and was sentenced to be imprisoned, giving up on life after creating basically the biggest mistake and regret in her life.

When are they killing the mc (the pink haired girl)? Or will she not get killed?