clue someone up Definition

clue
noun

1. A fact or circumstance which helps towards the solution of a crime or a mystery.

Thesaurus: hint, lead, tip, suspicion, intimation, inkling, sign, evidence, indication, pointer.
2. In a crossword puzzle: a word or words representing, in a more or less disguised form, a problem to be solved.

verb

clued, cluing
1. To direct or indicate by giving a clue.

Idiom: not have a clue

colloq
To be completely ignorant about something.

Etymology: 17c: variant of clew, from its use in finding the way out of a maze.

Phrasal Verb: clue someone in or up

To inform them.