Suggestions needed on how to clean this up

Bruce Donzanti

I am capturing the Pacman nebula in NB using a ZWO ASI294MM Pro on an 80mm apo triplet refractor using guided 300s subs.  I noticed that after applying darks, flats, and dark flats, the amp glow is completely removed but one corner has what appears to be light rays from a bright star or some other object.  It is most prominent in the Ha 5nm chroma filter but a very faint amount can be seen with the OIII 7nm filter as well.  I do not think it is inherent with the camera as other objects do not display this effect.  Besides cropping, can you suggest a way to remove it?  Clone stamp is ok but not great and trying DBE does not get rid of it.  Here is a Ha image- just a few calibrated frames. 

 

Bruce Donzanti

I found out what this is thanks to Adam on the PI forum.  

BlockHead

https://pixinsight.com/forum/index.php?threads/trying-to-remove-some-distortion-from-this-image.15472/

for reference

-the Blockhead