Moat menace is a term used to describe the threat posed by crocodiles to people living near bodies of water. CROC is the four-letter solution to the crossword clue, and it refers to the large reptile that can be found in many tropical and subtropical regions. Crocodiles are known for their powerful jaws and sharp teeth, which can cause serious injury or even death to humans who come too close. They are also capable of swimming quickly and silently, making them a dangerous predator in the water.