let's talk
Let's go over the details of some bigger issue or topic. Let's talk, Deborah. Something has been really affecting your mood and performance in work, and I'd like to get to the bottom of what that is. I like the sound of your proposal. Come into my office tomorrow, and let's talk.
Let's talk (about it).
Let us talk about the problem and try to settle things. Tom: Bill! Bill! I'm sorry about our argument. Let's talk. Bill: Get lost! Sally: I've got a real problem. Bob: Let's talk about it.