Stumped by ‘Pro fighter?’ Find the answer here!

As a detective solving the mystery of the crossword clue “Pro fighter?“, I first looked at the word “fighter” and immediately thought of someone who fights for a cause or belief. Then, I noticed the “?” at the end of the clue which indicated that the answer might not be a straightforward one. I began thinking of words that meant the opposite of “pro” or professional, and the word “anti” came to mind. The word “anti” means against or opposing something, which fits the description of a “fighter” who is not a professional but is fighting for a belief or cause. The play on words in the crossword clue was clever, using the word “pro” to mislead initially, but with some deeper thought, the answer “ANTI” became clear.