Is that flare? It looked like screening to me (for comfortable porch sitting while keeping all the flying stuff at bay). I am certainly no expert in PhotoShop, but wouldn't making a few passes with the Burning Tool do the same trick with less effort?
Lens flare for sure -- you see it in the lawn as well.
The burning tool would have a different effect. Lens flare both lightens an area and drops contrast. You need to address both problems. The burning tool will just darken the flare. That'll help but without the contrast fix it's a weaker solution.
Joe