The answer to the crossword question “One who snitches” is RAT. A rat is a term used to describe someone who informs on others, often for personal gain or to avoid punishment themselves. This term is commonly used in criminal contexts, where individuals may be pressured to provide information to law enforcement or other authorities. While being a rat is generally considered negative, some argue that it can be a necessary means of protecting oneself or others from harm. Regardless of one’s opinion on the matter, the term rat remains a common descriptor for those who betray the trust of others.