Unrepeated event ... as seen in 11- and 13-Across?

Let's find possible answers to "Unrepeated event ... as seen in 11- and 13-Across?" crossword clue. First of all, we will look for a few extra hints for this entry: Unrepeated event ... as seen in 11- and 13-Across?. Finally, we will solve this crossword puzzle clue and get the correct word. We have 1 possible solution for this clue in our database.