Made invisible! (3)
I believe the answer is:
hid
'made' 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?
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for hid that I've seen before include "Shrouded" , "Stayed out of sight" , "Remained out of sight" , "Took cover" , "Concealed (oneself?)" .)