Yes, it's a single flake from a core. Old world neolithic usually is. These are sharp when new. Usually, they're straight and narrower, though. I wonder if the bend was intended and controlled by the kanpper, but it looks like. Maybe with a short sideways flake taken before releasing the blade.
Might be from a sickle of sort, but then there'd be now wear on the outer edge. But I've seen some crescent blades in sickles, but they where retouched on the outer bend.
On the other hand, this would also make a very nice knife or conveniently be handeled as it is, as well.