The term JIB SUPPORT is a sailing term that refers to the support of a jib sail. A jib sail is a triangular sail that is set at the front of a boat and is used to help propel the boat forward. The crossword solution for this term is MAST, which is the vertical pole that supports the jib sail. The MAST is an essential part of the jib support system, as it provides the necessary stability for the sail to be effective.