Scientist ____ Curie (5)
I believe the answer is:
marie
'scientist curie' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for marie that I've seen before include "- Lloyd, English music- hall entertainer" , "-- Curie, scientist" , "girl" , "French queen, d.1793" , "-- Antoinette" .)