I just racked my hard cider. There is leftover liquid with lees now and I was wonder if that can be filtered and drank. Any thoughts ?
Any leftover "suds" is just as alcoholic as what you've racked, but lacks carbonation. You can drank it, but it will be a flat version of whatever will come out of the bottles/keg in a week or two.
Personally, I've put the left over liquid from beer brewing over ice to get an advanced taste of what my brew will be like, and to make sure it wasn't infected. Its not as enjoyable as the finished product, but still drinkable in small quantities.