If your tree is at a safe distance, Philip's advice will work. I have done almost exactly what
@Philipwonal described for you. I used stump remover powder, drilled a ton of holes as deep as I could get them in the stump, and filled with the remover. The Roundup in roots if suckers pop up is an excellent suggestion I wish I had thought of. Over the winter, I kept the stump constantly wet, to encourage the stump to rot a bit. I replaced the stump powder a few times too. With a bit of whacking away with a big awl, we removed it without breaking our backs. Good Luck!
