Sometimes you want a level of sharpening which can cause problems at high contrast edges. You end up with a halo.

The fix is a bit of an effort but set your clone tool to Darken with a smallish brush. As it usually but not always happens at a sky you can clone in from sky close to the halo without worrying about the accuracy of your clone


An example of the halo around the lamp


Using Clone Darken I have just done a small section of each edge of the lamp.