President of the Society of American Magicians from 1917-1924, Harry — (7)
I believe the answer is:
houdini
(Other definitions for houdini that I've seen before include "Escape artist, d. 1926" , "Harry . . . . . . ., famed American escapologist" , "Expert at escaping" , "Famous American escapologist Harry ......." , "American escapologist, d. 1926" .)