The Clue "Dude!"
The Answer BRO
The word "bro" is a casual term often used to address a friend or a guy, making it a perfect fit for the clue "Dude!" It conveys a sense of camaraderie and familiarity, similar to how "dude" is used in conversation. Both words are popular in informal settings and reflect a relaxed, friendly attitude. Therefore, "bro" is a great answer for this crossword clue.