clue

clue someone in (on something)

to inform someone of something. Please clue me in on what's been going on. Clue in those guys before it's too late.

have a clue (about something)

Fig. to know anything about something; to have even a hint about someone or something. (Usually negative.) I don't have a clue about where to start looking for Jim. Why do you think I have a clue about Tom's disappearance?

See also: have

not a glimmer (of an idea) and not a clue

Fig. no idea. A: Where's the subway? B: Sorry. Not a glimmer of an idea. How long till we're there? Not a clue.

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not have a clue  (informal)

to have no knowledge of or no information about something 'How much do houses cost in Yorkshire?' 'I haven't got a clue.' (often + about ) Internet researchers in the 1980s didn't have a clue about the exciting online landscapes of the future.

See also: have

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clue somebody in also clue in somebody

to give someone information they need or want I asked David to clue us in on what needed to be done first. He hung the painting to clue in visitors that this was a different kind of place.

not have a clue also without a clue

to have no knowledge or information about something The guy doesn't have a clue what forestry is all about.

Usage notes: sometimes used in the form have a clue: Before most doctors have a clue about what a new drug can do, it's being sold to the public.

See also: have