Crossword clues for the word: USEIN The word USEIN has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for USEIN Showing 1 to 5 of 5 results Clue(s) "___ case of emergency" """___ a well ventilated area;"" product warning" """Not for ___ toilets"" (Drano bottle's caution)" "What's the ___ trying?" For ___ an emergency