Prompt delivery (6)
I believe the answer is:
induce
'prompt' is the definition.
(thesaurus)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for induce that I've seen before include "Persuade, hasten childbirth" , "Bring on, cause to happen" , "Give rise to" , "Persuade or bring on, say birth" , "Bring on by artificial means" .)