Take a small pot and add in your cannabis and Everclear. Keep the heat on medium low, at a simmer but never at a boil. This heat will burn off a lot of the alcohol.
The alcohol is in the recipe in order to extract the THC from the cannabis. After you have brought the cannabis and alcohol up to the right temp, add in half of the glass of water. The mixture should cook until about half of it is evaporated.
Then, strain the mixture through cheese cloth to remove any leftover cannabis sediment. Be sure to squeeze the cheesecloth out to make sure that you get all of the trapped liquid.
Finally, you can add in the rest of the water, freshly squeezed lemon juice, and sugar as you see fit. Store this drink in the fridge! Enjoy!