Thanks so much for replying..
so far so good, but I'm missing a step? It does clone but the destination needs to be selected (limited) to prevent the new paint from going beyond the edges of what is to be painted?
IOW I have a gable end of a house that needs to be the same texture as the other gables but the new gable is an odd shape so need to be selected (As in Select/polygon) to prevent the source paint from going past the destination boundaries.
Normally I would expect to "select/polygon" the destination boundaries, then change to the clone function and paint the selected destination from the source into the polygon area. But when I choose the clone function, the selection function disappears or if I enable the clone with the polygon present and start to paint, it ignores the polygon selection?