To clock someone seems to be just calling them out for their ******** and ending it there.
Dragging seems to be an unnecessary attack not unlike dragging someone by their hair by offending the person to almost no end… Like a gut punch after gut punch and not stopping until the other side concedes defeat…
A clock is just a quick check up and putting someone in their place with one point. No more than a paragraph.
A drag is when you go completely in, at LEAST a paragraph, take a lot of personal shots with multiple points and come out with at least 2 WP's.