Deprived by an unreasonable dun, indeed! (7)
I believe the answer is:
denuded
'deprived by an' is the 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?
'unreasonable dun indeed' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'dun' is 'nud' which is located in the answer.
The remaining letters 'deed' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for denuded that I've seen before include "Laid bare" , "Stripped" .)