For pronunciation, it's mostly clear, but not always clear; he would probably get 5.

大都清楚的，总很清楚，那么他可能会得5。

Even though it's completely fine and great and clear if you release the T here.

如果你在这里 T 会很好很清楚的。

His pronunciation is clear, but he has a heavy accent which makes him difficult to understand sometimes.

他的清楚，有很重的口，这让他有时理解困难。

And you want to be in a place of power where you know that you pronounce things clearly depending on who you are speaking with.

如果你想做一个有力的演讲，你知道你的清楚取决于你和谁说话。