The term 'FROZEN DOWNPOUR' is a combination of two words, 'FROZEN' and 'DOWNPOUR'. The first word, 'FROZEN', is an adjective that describes something that is very cold or has been FROZEN solid. The second word, 'DOWNPOUR', is a noun that describes a heavy rain. The crossword solution for this term is 'SLEET', which is a type of precipitation consisting of small ice pellets that are created when snow melts as it falls through the atmosphere. SLEET is often associated with cold weather and can cause hazardous driving conditions.