Forerunner, predecessor (9)
I believe the answer is:
precursor
This clue is a double definition.
'forerunner' is the first definition.
(I know that forerunner can be written as precursor)
'predecessor' is the second definition.
(I know that predecessor can be written as precursor)
(Other definitions for precursor that I've seen before include "Forebear" , "Man coming before me" , "harbinger of what is to follow" , "Forerunner, predecessor" , "I was here first" .)