It means to make a situation clear for everyone so there's no confusion. It's kind of like the expression "Are we all on the same page here?" For example: "Let's get this clear. You really expect me to quickly do all these jobs for that little bit of money?"

It means: Let get our minds clear on this issue. Let's get a clear understanding of this. Don't confuse "get" with "make".

Yep,your answer gets this clear.