Crossword clues for the word: UST The word UST has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for UST Showing 1 to 5 of 5 results Clue(s) ___-Kamenogorsk (Kazakh city) "___-Kamenogorsk, U.S.S.R. city" "___-Kut, Russian town" Geithner's dept. IRS's dept.