Friedan's cause (8)
I believe the answer is:
feminism
'friedan's cause' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for feminism that I've seen before include "Movement to gain equal rights for women" , "International movement for the rights of women" , "Doctrine that advocates equal rights for women" , "Women's movement" .)