Like a biting wit

The answer to the crossword question “Like a biting wit” is ACID. This term is often used to describe a sharp or sarcastic sense of humor that can be cutting or caustic. Just as acid can eat away at materials, a biting wit can cut through social norms and expectations, exposing the truth or highlighting the absurdity of a situation. Whether used for good or ill, an acid tongue can leave a lasting impression on those who hear it.