you can often make invisible repairs with regular acraglass (old style-NOT the gel!!!). Do not mix floc with it so it is just a clear epoxy. If the scratch is deep, then you may need to fill it in a couple of applications, do a little over half each time, then sand down to the wood. I have done this and ccould not find the imperfection after finishing the stock. This works especially well in the checkering, but it also works in all areas of the stock. Ihad read this a long time ago and did not beleive it would work, thinking I would always be able to see the area with the thick epoxy. But I tried it and found I was wrong-it really does a good job of hiding imperfections.
If the wood fibers have not been cut, the steam out whatever you can as posted above. Even if the fibers have been cut, it won't hurt to steam it to see if some of the wood on the bottom of the gouge is just compressed and not cut. We can't say without seeing it.
And as stated above, if not too deep then you can reshape the stock and take out the imperfection. Again, without a picture we can't say what fixes might be best.
