Divided They Stand
Clearing Customs
Big shakeup at Custom House (500 S. Dearborn St.; 312-523-0200): Shawn McClain, the original exec chef/partner/driving force, is on his way out at the South Loop standout. While still a part owner, McClain and his long-time partners at Custom House, Green Zebra, and Spring, Sue and Peter Drohomyrecky, are trying to figure out how to divide…