Hold down CTRL, what will make the cursor an eye-dropper, and move the target circle with the cross-hair and the eye-dropper in it over your source you want to copy, now click and let go your LMB to grab (or mark) your source point and move your target circle with its cross-hair to your target point, the point to where you want to clone and now let go CTRL also, now you have defined source, direction and distance and can paint, and from the “let go”-moment your, initially the source selecting, cross-hair gets the target-point where it will paint what is in the now the source-region covering source circle. Is it really so hard?
Michelist