Crossword clues for the word: LIGHTUP The word LIGHTUP has appeared as an answer to at least 11 crossword clues on different crossword puzzles. Crossword clues for LIGHTUP Showing 1 to 11 of 11 results Clue(s) "Get high, in a way" Become visibly cheerful, seeing broadcast plug hit Brighten, or a hint to each starred answer's vertical continuation Clue for the four longest answers in this puzzle Display joy Pay no heed to smoking rules Seem suddenly brighter when you start smoking Show elation Show sudden joy Start to shine Start to smoke