Skywalker of sci-fi (4)
I believe the answer is:
luke
'skywalker of sci-fi' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for luke that I've seen before include "One of the Gospels" , "Physician gospeller" , "Matthew, Mark, - - and John" , "Third NT book" , "One of the four Evangelists" .)