Grey Meadow, the Industrial Hub

You could try taking it out of your world and putting it in a build world and then using the ingame world editor - click into it as if you are going ti use the lots, but click the trees instead, and try using that hand to grab the tree. In the we you need to grab the item with the hand and hold it, and use the delete on your keyboard to delete it. You can not usually use the mouse for doing both for some strange reason. But anyway if you can successfully remove it, then save it. From there I guess it would need installing into CAW how ever you install things that others give you to use in your world.

But just as there are CAW limits, sometimes it is also tricky in the world editor seeing it only works half way half the time. To date though I have not had any issues using it to delete some things like that.

Also that is all if the tree is in fact on that lot. I have seen times when things in the world creep over a lot border and appear to be on a lot when they are not. The become hard to get rid of if the trees are done in CAW and are part of a cluster. I think clustering locks them in to where they are - I am just not sure not being a CAW user like you are.