Corrupted uni finisher indeed (8)
I believe the answer is:
degraded
'corrupted uni' is the definition.
The definition and answer can be both related to change as well as being past participle verbs.
Maybe they are linked in a way I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for degraded that I've seen before include "Reduced in worth" , "Lowered in quality" , "Disgraced, lowered in rank" , "Sordid" , "Humiliated" .)