Rendered invisible! (6)
I believe the answer is:
hidden
This might be a double definition.
'rendered' is the first definition.
The answer and definition can be both related to change as well as being past participle verbs.
Maybe they are linked in a way I don't understand?
'invisible' is the second definition.
(similar in meaning)
Can you help me to learn more?
(Other definitions for hidden that I've seen before include "Unseen" , "Concealed, recondite" , "Concealed, having been put away secretly" , "Abstruse" , "Obscure" .)