Crossword clues for the word: UNDERGROUND The word UNDERGROUND has appeared as an answer to at least 10 crossword clues on different crossword puzzles. Crossword clues for UNDERGROUND Showing 1 to 10 of 10 results Clue(s) *London subway system, with "the" "Lead track off Tom Waits's 1983 album ""Swordfishtrombones""" "Maquis, for instance." Brit's subway British subway system Like Harriet Tubman's railroad Like Tubman's railroad Resistance insufficiently worn down? Secret not fine enough? Secret revolutionary force