In every other panel, when there is a style override, resulting in a + symbol, if you hover over the symbol, it will tell you specifically what the overrides are. For example, a different type size, or font family or leading or something along those lines.

But in the Condition Sets dropdown, all you get is that there are overrides. And you can either clear them or redefine the set. But if I choose to clear the overrides, I have no way of knowing what the result will be.