Step 2: Use Clone Stamp Tool to Remove the Subject
Hide the newly created layer and activate the “Background” layer.
Grab Clone Stamp tool from the tool panel or press Shift + S again and again until it comes. We need to remove the subject. So, I am going to use the trees as my source and I am going to brush the man.
Your photo should look like this.
Step 3: Apply Motion Blur in Photoshop
Go to Filter>Blur>Motion Blur.
The angle depends on the motion on the subject. It is horizontal in my case so I am putting the angle as 0. I am keeping the distance as 110 pixels because it suits me the best. You can change as per your preference. Press OK.