Thks for prompt help. Will try cloning , as you suggest.
I am messing with the original as I changed the background which is now a light brown colour but, in doing so, the edge of the head of hair where it meets the background colour shows a thin layer of brown which I want to change to black.
As for the featureless black, perhaps I should forget about it since you say it is a very difficult job which bothers even the experts, let alone me.
Thank you again.