"Speaking Truth to Power" author Hill (5)
I believe the answer is:
anita
'speaking truth to power author hill' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for anita that I've seen before include "Female" , "- Loos (Gentlemen Prefer Blondes)" , "Woman" , "eg Dobson or Roddick" , "-- Loos, US writer" .)