After the excitement of the Tournament of Champions, it was time to get back to the regular games. In fact, the very first match after the Tournament, the November 23, 2015 edition, had an Oz clue. For $400 in the category Yellow (see, you're already going through the possibilities in your brain, I can tell):
Laura, the defending champion, got in first and correctly responded, "What are yellow bricks?" She went on to win the match easily, and one more as well before she was defeated.
And that catches us up with Oz in Jeopardy! for now. There has been a strangely long run without Oz clues now, but I suspect we'll get a few more before the season is out.