This is a hypothetical. I don’t know if the situation has ever occurred on the show. I imagine it might happen to me if I’m ever a contestant because my tongue often trips me up when I’m playing along at home. The general rules of the game are easy enough to find, but I’ve never seen the complete rules posted or printed anywhere. Perhaps some of the former contestants here have access to more detailed rules.
Suppose I’m a contestant, ring in, and give the response “What is Saudia Arabia?” in place of the correct “What is Saudi Arabia?” (A mispronunciation I made today, incidentally). If I correct myself before Alex rules, no problem. But suppose Alex mishears and incorrectly rules in my favor before I can correct myself, and suppose that Alex is not immediately overruled by the judges. I know I have mispronounced the name, and suspect the judges will review the tape and eventually rule against me. Should I correct my response before picking the next clue, or is it too late under the rules of the game?