Double Jeopardy is a game show that was created by Merv Griffin and first aired in 1974. It is a variation of the popular game show Jeopardy! where contestants compete for cash and prizes by answering trivia questions. The term 'Double Jeopardy' refers to the fact that the contestants are given two chances to answer each question correctly. The correct answer to the crossword clue 'DUEL' is DUEL, which is a four-letter word meaning a fight or contest between two people.