Famous escapologist (7)
I believe the answer is:
houdini
'famous escapologist' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for houdini that I've seen before include "one who'd try to escape?" , "Hungarian-born American magician, d. 1926" , "Harry was famous as an escape artist" , "Harry . . . . . . ., famed American escapologist" , "tie-break ace" .)