Oz in Jeopardy!

It's been a little while since I've been able to do one of these, but the long holiday weekend and not much else going on means it's time for another look at Oz on America's favorite answer-and-question quiz show. On the January 19, 2018 episode, the final category in the Double Jeopardy! round was Say Uncle, where you name the uncle of the fictional character given. Yes, a little convoluted, but a lot of fun. The final clue, for $2000, was this:

Sarah, the challenger on the right, nervously rang in and responded, "Uncle...the guy!" That was clearly wrong, nobody else tried, so "Who is Uncle Henry?" became a triple stumper. But by ringing in and trying, Sarah may have hit the opposite of my usual theory about the player knowing the Oz clue goes on to win: She didn't know it, so she came in third!

Also today, my Jeopardy! page-a-day desk calendar had this clue, also for $2000, in the category Cotton is King:

DOROTHY'S ICONIC BLUE AND
WHITE CHECKED PINAFORE IN
THE WIZARD OF OZ WAS MADE
FROM THIS COTTON FABRIC

The correct response is, of course, "What is gingham?"