Sharpshooter Oakley (5)
I believe the answer is:
annie
'sharpshooter oakley' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for annie that I've seen before include "girl instructed to get gun" , "Musical about markswoman" , "Musical heroine" , "Cartoon strip orphan" , "- Hall, Woody Allen film" .)