Is it a dry clean only blouse? I hand wash some of my dry glean only blouses but it depends on the fabric. One of the best thing for grease stains for me is a drop or two of clear dish soap on the spot and then run hot water through it. I then hand wash the whole blouse. I don't know what you could use on the dry cleaning stain. I think a trip to the dry cleaner to see what they used may be the best way to go.