CLARKSVILLE, Ind. (WDRB) — One person died after a duplex went up in flames in Clarksville early Thursday morning. The fire was reported just before 6:30 a.m. That’s when the Clarksville Fire Department responded to reports of a structure fire in the 700 block of W. Harrison Avenue. That’s in a neighborhood near the intersection of South Clark Blvd. and Stansifer Avenue…