The term 'FREEZES OVER' can be broken down into three separate crossword solutions: ICES (4 letters), ICSUP (5 letters), and ICESUP (6 letters). ICES is an acronym for the International Commission for the Exploration of the Sea, an intergovernmental organization that works to promote the sustainable use of marine resources. ICSUP stands for International Council for the Exploration of the Sea Upper-level Processes, which is a sub-organization of ICES that focuses on the physical and chemical processes of the ocean. Finally, ICESUP is an acronym for the International Council for the Exploration of the Sea Upper-level Processes Modeling Group, which is a research group within ICSUP that develops models to better understand the upper-level processes of the ocean.