"... one giant ___ for mankind" (4)
I believe the answer is:
leap
(Other definitions for leap that I've seen before include "Sudden surge" , "Jump suddenly" , "as 1984 was" , "Jump a long way" , "Sort of year" .)
I believe the answer is:
leap
(Other definitions for leap that I've seen before include "Sudden surge" , "Jump suddenly" , "as 1984 was" , "Jump a long way" , "Sort of year" .)