"A Fistful of Dollars" director
I believe the answer is:
'a fistful of dollars director' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for leone that I've seen before include "African rhino" , "Sergio ___ , Italian film director d. 1989" , "Sierra ___ (West African country) - Sergio ___ (film director)" , "Sergio --, spaghetti western director" , "ready for Africa" .)