John Jacob ____ (5)
I believe the answer is:
astor
'john jacob' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for astor that I've seen before include "First woman to sit in the House of Commons, d. 1964" , "Nancy ---, first woman MP" , "See 2" , "First female MP" , "Female politician" .)