What one situation has to do with the other is not entirely clear, but there you have it.

Why the police came to the house is not entirely clear.

What that new approach was, he didn't make entirely clear.

The true population of the area is not entirely clear.

Exactly how things came to such a pass is not entirely clear.

Most people are not entirely clear on what the word "congress" means.

Exactly what has happened the previous night is not entirely clear.

What actually was the reason for this is not entirely clear.

"Though I still don't think my mom's entirely clear on the whole situation."

Her memory of what had happened in the music room was not entirely clear.