The crossword solution for the term IN NEED OF A MUFFLER is NOISY, which is an adjective used to describe a sound that is loud and unpleasant. A muffler is a device that is used to reduce the noise of an engine or exhaust system. Therefore, the phrase IN NEED OF A MUFFLER can be used to describe a vehicle that is making a loud and unpleasant noise, likely due to a malfunctioning or missing muffler.