'Clue in' is typically used in casual conversations, not formal ones.

Informal Context

'Clue in' often implies directly communicating information to someone.

Direct Involvement

Use 'clue in' to share information that is currently important or relevant.

'Clue in' used in the sense of understanding may involve a moment of realization.

The phrase can indicate coming to an understanding unexpectedly.

It can suggest a delay or initial difficulty in grasping the concept.