Satisfy upset Thorpe Park-goers at last following early closure of attraction (7)
I believe the answer is:
appease
'satisfy' is the definition.
(appeasing is a kind of satisfying)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for appease that I've seen before include "Placate (someone) with concessions" , "Propitiate by concessions" , "To behave like Chamberlain" , "Mollify or calm by making concessions" , "Calm, pacify, placate" .)