French emperor (8)
I believe the answer is:
napoleon
'french emperor' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for napoleon that I've seen before include "Frenchman known as The Little Corporal" , "No one, pal, matches this Little Corporal" , "French general and emperor" , "The familiar Bonaparte" , "Extended nap" .)