In the above image, the edge of model’s skin has the extra color which I want to delete. If you use Clipping Mask, you can do it.
Create new empty layer on the model’s layer and choose ‘Create Clipping Mask‘.
the above layer only effects the below layer. If below layer has layer mask, the above layer will be limited within the layer mask area.
Choose Clone Stamp tool.
Clone the model’s skin and move the edge. You can see how delete the extra color.