"murky wine..."See in text(Drinking Alone Beneath the Moon)
As opposed to the clear wine, “murky wine” likely refers to red wine. While white wines are clear, red wines are “murky” in the sense that you cannot see through them. Red wines also tend to have stronger fragrances and tastes, creating a more complex drinking experience. For these reasons, we can see why the speaker associates red wine with wisdom. Wisdom is, among other things, the ability to reason with information, to seek answers to complicated issues.
