"___ a fool not to!" NYT crossword answer is:IDB (3 letters length)
The answer for "___ a fool not to!" crossword clue is listed above to help you solve the puzzle you are currently working on.
This phrase is often used to emphasize the importance of taking advantage of a certain opportunity or situation. It implies that not taking advantage of the opportunity would be foolish and could lead to regret. It is a reminder to not let a good opportunity pass you by, and to take advantage of it while you can.