I had a crack in the same area on one of my guitars. After rehydrating it and getting the crack to close, I used CA glue a on the crack. The crack just sucked the glue in, and I did multiple applications until it was even with, and in, the poly finish. Then I wet sanded, and buffed the top. It was a practically invisible repair.
Rehydrating the wood was really important because the fretboard had shrunk, and took the top with it. And the crack was almost able to take a dime, we'll at least it was half a dime. The fret ends were sticking out past the fretboard before the repair and after three weeks of humidification, I only had to smooth two fret end . It was in 17 to 25 percent humidity for a few weeks when it cracked..
Had the guitar not been a Cordoba with a poly finish, I would have used better glue. I also don't like using CA glue on laquer.