Relay a positive experience, detailing the situation, framing the setback, how you dealt with it, and what you learned from it, providing what you consider failure looks like to you. Detail what you would've done differently and how you avoided repeating it.

"I inherited the workload of an employee that was underperforming, a lot, and was let go. It was overwhelming. I suffered from task paralysis and had trouble getting started. Long ago, a mentor suggested in situations like this I always tackle the biggest aspect of an overwhelming project first, since that was what I felt most daunted by. It was good general advice, and I listened to it. However, in this instance, I should have taken a different approach. I lost focus on the priorities of the project, where instead of focusing on the tasks one by one, I should have looked more closely at the broader view of the problem at hand. As a result, I didn't manage my time well and should have approached the project differently. I missed that target, but never made the mistake again."