I think if you dissolved it in a small amount of boiling water to break up lumps and cooled that it’d work ok. Is it fermenting yet ? If not you’d be able to mix it pretty uniformly and not worry about aeration.
I added a pound of DME to 3 cups water. Big time clumping. It was a humid night, too, so it was clumping before it even hit the water. Glad I didn’t try to add it straight to the fermenter.
I usually mix up a cup of light dme in a quart or two of water. I would boil it for 10 minutes, cover it and let it cool down. Then I would pour it into my secondary before transfering from the primary. I also and a few pellets of hops for good measure doing the boil.