Study due for change again (8)
I believe the answer is:
readjust
'change again' is the definition.
('adjust' is an answer for 'change' so perhaps 'readjust' is OK for 'change again')
'study due' is the wordplay.
'study' becomes 'read' (synonyms).
'due' becomes 'just' (both can mean deserved or fair).
'read'+'just'='READJUST'
'for' is the link.
(Other definitions for readjust that I've seen before include "settle again" , "Adapt again" , "make further amendment" , "Again modify" , "right again" .)