Pioneer American aviator, who disappeared with her navigator in the Pacific, 1937 (7)
I believe the answer is:
earhart
(Other definitions for earhart that I've seen before include "Flying ace" , "Amelia __ , aviator, d. 1937" , "Amelia . . . . . . . , pioneer aviatrix" , "Amelia ....... was pioneering American aviator" , "Amelia --, air pioneer" .)