Made a great deal of upside-down desserts (8)
I believe the answer is:
stressed
'made a great deal' is the definition.
The answer and definition can be both related to change as well as being past participle verbs.
Perhaps you can see a link between them that I don't see?
'upside-down desserts' is the wordplay.
'upside down' says the letters should be written in reverse.
'desserts' back-to-front is 'STRESSED'.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for stressed that I've seen before include "Hassled, under pressure" , "on edge" , "Drew attention to" , "Feeling tension" , "Brought out" .)