Don't be scared, but creepy clowns in random windows only means that Halloween is just around the corner. The one above is in the window at the building at 9th and Wabash. If you're new to the neighborhood this usually vacant retail space is converted into a pop-up Halloween store every fall. So if you need to locate a costume, we highly suggest going here.
Also, we've been told that the retail space at the corner of 9th and State also has a pop-up store for Haloween. Sounds like the area is covered well for Halloween.