clue in


anything that serves to guide or direct in the solution of a problem, mystery, etc.
clew ( defs 1–4, 6, 12 ).
verb (used with object), clued, cluing.
to direct or point out by a clue.
clew ( def 7 ).
Verb phrases
clue in,
to provide with useful or reliable information: Clue us in on how these forms are to be filled out.
to make familiar or aware: Has she been clued in about the rules of this office?

variant spelling of clew

1. sign, hint, trace, evidence, mark, key. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
clue (kluː)
1.  something that helps to solve a problem or unravel a mystery
2.  not to have a clue
 a.  to be completely baffled
 b.  to be completely ignorant or incompetent
vb , clues, cluing, clued
3.  (tr; usually foll by in or up) to provide with helpful information
n, —vb
4.  a variant spelling of clew
[C15: variant of clew]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

phonetic variant of clew (q.v.) "a ball of thread or yarn," with reference to the one Theseus used as a guide out of the Labyrinth. The purely figurative sense of "that which points the way" is from 1620s.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Idioms & Phrases

clue in

Also, clue up. Give someone guiding information, as in It's time someone clued us in on what's happening, or I hope they clue us up soon. This expression, which uses the verb clue in the sense of "inform," is sometimes put simply as clue (as in I'll clue youthis isn't going to work). [Colloquial; mid-1900s] Also see not have a clue.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Idioms & Phrases
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