Two short lines carry a whole scene: ice has been forming all morning, and the result is a world that looks clear. The poem leaves out who is watching and where, so we fill in the picture ourselves. Maybe frost on windows, a glazed pond, or branches coated in a thin shell of ice.
The word "clear" works in two ways. Ice is literally transparent, so it can make things sharp and bright. But the title, "Clarity," hints at something beyond eyesight, a sense of calm, of things seen plainly. The speaker doesn't announce a feeling, yet the quiet wonder is easy to catch. "All morning" suggests patient watching, as if the ice is slowly doing careful work.
The mood is still, cool, and attentive. Nothing hurries here. The poem asks us to slow down, notice a small change in the weather, and treat it as something almost like a gift.