That poor clone

.. Here are some suggestions:
1) Keep the clone out of the sunlight
2) You need to cut the tips of the leaves off about halfway up to reduce the leaf surface area. Clones can't get enough water without roots to keep the leaves hydrated.
3) Put a humidity dome over the plant. If you don't have one, you can make one using a large Ziplock. If you're going to use a ziplock, mist the inside of it with water, put it over the plant, tie the ziplock closed around the pot without the leaves touching the side of the ziplock.