cause to happen (6)
I believe the answer is:
induce
'cause to happen' is the definition.
(inducing is a kind of causing to happen)
This is the entire clue.
(Other definitions for induce that I've seen before include "Bring on, cause to happen" , "Give rise to" , "Persuade, hasten childbirth" , "Bring on by artificial means" , "Persuade or bring on, say birth" .)