A Henley boat is a type of rowing boat used in the sport of rowing. It is named after the town of Henley-on-Thames in England, where the first Henley Royal Regatta was held in 1839. The term 'Henley boat' is often used to refer to any type of rowing boat, but it is most commonly used to refer to a single scull or double scull boat. The crossword solution for the term 'Henley boat' is 'SHELL, ' which refers to the SHELL-like shape of the boat.