This quest is not available in game.
Seriously, go slay those Evil Squirrels!
Clayton wants you to find and slay twenty Evil Squirrels.
You will also receive:
The zone label for this quest in the Quest Log is Designer Island. I have no clue on how players got their hands on it, but thanks to someone for sharing with Alayea, who then shared it with me.
Thanks for outing me. =P