Crossword clues for the word: SUBSOIL The word SUBSOIL has appeared as an answer to at least 4 crossword clues on different crossword puzzles. Crossword clues for SUBSOIL Showing 1 to 4 of 4 results Clue(s) Field stratum Near-the-surface earth layer Replaces fossil fuel that is found just below the surface What you found at the bottom of the bed?