It will recover, and you can groom the plant. What you can do is a straight cut across the entire plant, blades and all. Leave about 4-5 inches of growth left, so you don't shock the plant any further. The other method is just selective grooming, by taking out of the damaged stalk and blades. This will result in a "thinned" plant look and wouldn't be as aggressive as the first recommendation. And whatever you do, do not provide fertilizer until you have regained the plant entirely. Too much fertilizer will result in weak and "soft" growth, and maybe provide a downward spiral for the grass.