Crossword clues for the word: GRANDFATHERCLOG The word GRANDFATHERCLOG has appeared as an answer to at least 2 crossword clues on different crossword puzzles. Crossword clues for GRANDFATHERCLOG Showing 1 to 2 of 2 results Clue(s) Drain problem caused by your dad's dad? Reason for an older male relative to use Liquid-Plumr?