Yup, another one! Not much, admittedly, and not directly Oz-related, but... Well, let me show you the clue first. This is from Friday's show, in the Jeopardy! round, in the category Greens:
Defending champion Fred (who eventually came in second) rang in and correctly responded with, "What is the Emerald City?" So see, it's Ozzy. Seattle was also my hometown for many years, and I remember when they picked "The Emerald City" as its nickname.