A gavel is a small wooden hammer used by a judge or presiding officer to maintain order in a courtroom or a meeting. It is typically used to signal the beginning or end of a session, the point at which to begin or cease speaking, or to emphasize a ruling or decision.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: Courtroom banger. Explanations are generated by AI and may be inaccurate.