The term 'RAFT PROPELLER' is a combination of two words, 'RAFT' and 'PROPELLER'. A RAFT is a flat-bottomed boat that is typically used for recreational purposes, while a PROPELLER is a device that is used to propel a boat through the water. The crossword solution for the term 'RAFT PROPELLER' is 'OAR', which stands for 'Outboard Auxiliary Rudder'. An outboard auxiliary rudder is a type of PROPELLER that is mounted on the stern of a boat and is used to provide additional thrust and maneuverability.