have a clue
Know what's happening
To have a clue is to have any idea or understanding about something.
The phrase appears almost exclusively in the negative: I don't have a clue where she went, He hasn't got a clue what he's doing.
Someone who doesn't have a clue is ignorant or incompetent.
The rare affirmative use is often ironic or defensive: I do have a clue, actually.
- out to lunchDistracted, unaware of surroundings
- lost the plotBecame irrational or confused
- slightestLeast in degree
- understandGrasp the meaning
- ignorantLacking knowledge or awareness
comprehend · catch on · grasp · wise up · on the ball · sharp as a tack · unawareness · realize · in the dark · obliviousness · none the wiser · insight · twig · recognize · knowledge · know · perceive · hunch