The public should be 'clued in' to what's happening. [=should be told about what's happening]
He doesn't have a 'clue' when it comes to fixing cars. [=he knows nothing about fixing cars]
He's totally 'clued in on' [=he knows a lot about] the latest computer developments.
(..) If we are to expect you to join us. The gate. We saw it, in the morass. I've been putting together all the clues I can about it. This. This drawing. - Where did you copy it from? - Guardian. And this? (..)2016 Warcraft