I did a pumpkin ale several months ago. Draining the mash, it got stuck RIGHT AWAY. I was at a loss but decided to just suck on the tube I was draining the mash tun through. I got a mouth full of pumpkin, but it flowed beautifully after that. Even the spargue water flowed like a charm. Not very professional but it worked for me! lol
Put a grain bag on the end of the hose and sturr it. Probably will get lots of trub and lower effeiciency but that's probably all you can do at this point...