I assume you mean »image« instead of »photoshop«.
Camera Raw is supposedly well equipped for the task.
Otherwise you could try Filters like Dust & Scratches and Reduce Noise.
Could you post part of the image in question?
You are quite right for some reason I never saw these options in filters, maybe because I was not looking properly. Have now used them and it has helped.
Thanks for your help.
Smart Blur might be another option.
Smart blur worked a treat. thanks