From Longman Dictionary of Contemporary Englishclue somebody ↔ in phrasal verb informalTELLto give someone information about something on/about Somebody must have clued him in on our sales strategy. → clue→ See Verb table
Examples from the Corpus
clue in• I later found out that many birds also hunt caterpillars by using their feeding damage as a clue.• We looked for more badger clues.• It is also possible that the semantic and phonetic clues are in fact operated on not sequentially but simultaneously.• This was expected to be a clue to changes in stellar magnetic fields.• A clue is contained in the exit polls.• A further clue may lie in the interpretation of accountability in the business world.• The only clue had come in the late morning.• With this Charles Shultz-like irreverence, the Swonkmeisters clue us in to their special spirituality. 