Entry 1 sense Webster, 1913 Clue /(klū)/ · IPA /kluː/ 01 n. A ball of thread; a thread or other means of guidance. Same as Clew. 1. A ball of thread; a thread or other means of guidance. Same as Clew. See: Clew “You have wound a goodly clue.” — Shak. “This clue once found unravels all the rest.” — Pope. “Serve as clues to guide us into further knowledge.” — Locke.