StatCounter tells me that so far this morning (and it's only 7:30), my blog has had five hits, from five different heartland locations, by people searching for the phrase "Shakespearean troublemaker." Are you all doing a crossword puzzle? If so, does it make you feel better to know that you're not the only one who Googles the clues when you get stuck? Anyway, I haven't seen your puzzle, but I'm pretty sure the name you're looking for is "Puck." Let me know if I'm wrong!
ETA: Turns out I was wrong... Four letters, yes, but it's not Puck (which I'm guessing is why SO MANY of you are ending up here in your search for help!). Check the comments below for the answer you want.