Well, this is an example why it is better not to use nets.
Give the fish some TLC over the course of the next week and keep a close eye on the wound site. Offer him up good food with lot of variety. If he will readily accept garlic soaked food, then soak his food in garlic. At the first sign of trouble, you may need medicate with antibotics. Do you have a hospital tank, just in case?
Clowns are pretty resilent fellows so don't worry to much at this point. I had a very small perc get sworded nearly in half by a hippo tang once. I thought for sure he'd die. He didn't and in fact, the wound healed up so nicely that unless I looked with a magnifying glass, I could hardly tell he'd been sawed nearly in half.
