Changes which should be made by wrongdoers (6)
I believe the answer is:
amends
'changes which should be made by wrongdoers' is the definition.
'amends' can be an answer for 'changes' (I've seen this before). I'm not certain of the remainder of the definition.
'changes which should be' is the wordplay.
I cannot quite see how this works, but
'changes' could be 'ends' (ending is a kind of changing) and 'ends' is located in the answer.
'be' could be 'am' and 'am' is located in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for amends that I've seen before include "Redress" , "Corrects" , "Makes minor improvements" , "Make these to atone for wrong done" , "Make these to atone for injuries or loss caused" .)