___ the Tiger (Mizzou mascot) (6)
I believe the answer is:
truman
(Other definitions for truman that I've seen before include "Harry S ..., former president of USA" , "Harry S. ---, US Pres." , "33rd president of the United States, d. 1972" , "US president, 1945-53" , "Harry S ... was 33rd US President" .)