The term 'FISH tail' can be broken down into three crossword solutions: MONGER (6 letters), YAW (3 letters), and ery (3 letters). MONGER is a term used to describe someone who deals in a particular commodity, such as a fishmonger who sells FISH. YAW is a nautical term that refers to the turning of a ship from side to side. Ery is a suffix that means 'having the characteristics of, ' so when combined with the word 'FISH, ' it would mean having the characteristics of a FISH. Together, these three words form the phrase 'FISH tail, ' which is the tail of a FISH.