Crossword clues for the word: PLEIN The word PLEIN has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for PLEIN Showing 1 to 6 of 6 results Clue(s) ___ -air: alfresco ___ air (method of painting) ___-air (daylight) ___-air (painting style) ___-air painting Full: Fr.