Result, come about (9)
I believe the answer is:
eventuate
I believe this is a double definition.
'result' is the first definition.
(I've seen this before)
'come about' is the second definition.
(I've seen this in another clue)
(Other definitions for eventuate that I've seen before include "Turn out" , "Result, come about" , "Occur as a result" .)