I. ˈklü noun
Etymology: alteration of clew
Date: 1596
1. : something that guides through an intricate procedure or maze of difficulties ; specifically : a piece of evidence that leads one toward the solution of a problem
2. : idea , notion
had no clue what he meant
II. transitive verb
( clued ; clue·ing or clu·ing )
Date: 1934
1. : to provide with a clue
2. : to give reliable information to
clue me in on how it happened