I haven't the slightest clue as to why I got more than anybody else.

We are in the process of getting a new CAD (computer-aided dispatch) system.

But they don't have a clue as to what to do about them.

This is not a clue...or is it?

Usually, people who ask 'do you know who I am?' don't have a clue themselves.

I haven't the slightest idea who he is.