Tom i had a go at your shot its not the best edit but a quick one to see what i can manage with it.
First thing i did was look at your EXIF data it said some things to me that made me think the shot is a bit overdone.
2- 1/1600 shutter at F6
The shot is therefore over exposed and no matter what you do the quality is lost.
You might have bumped the ISO a bit to 400 but in the process you have over cooked the image .
Try to shoot at ISO 100 and at F8 and especially in good weather.
Here is the edit i had a go at but like i said before its just for an idea
All the best with future uploads tom.