The crossword solution for the term 'SEND OUT A JET' is SPEW. This is an acronym for 'Special Purpose External Water', which is a type of firefighting system used to extinguish fires from a distance. It is typically used in situations where it is not safe to send firefighters into the area, such as when a fire is too large or too dangerous. The system works by sending out a jet of water at high pressure to put out the fire.