Spooner's sentimentality, something sweet providing inducement (4,5)
I believe the answer is:
hush money
'inducement' is the definition.
(inducement to stay quiet about something)
I don't understand the rest of the clue.
(Other definitions for hush money that I've seen before include "Price of silence" , "Payment to ensure silence" , "sweetener" , "Payment to keep another silent" .)