Crossword clues for the word: MSTA The word MSTA has appeared as an answer to at least 4 crossword clues on different crossword puzzles. Crossword clues for MSTA Showing 1 to 4 of 4 results Clue(s) "River, 270 miles, into Lake Ilmen." Feeder of Lake Ilmen River into Lake Ilmen. River to Lake Ilmen.