Reparation, note, meant changes (9)
I believe the answer is:
atonement
'reparation' is the definition.
(thesaurus)
'note meant changes' is the wordplay.
'changes' is an anagram indicator.
'note'+'meant'='notemeant'
'notemeant' with letters rearranged gives 'ATONEMENT'.
(Other definitions for atonement that I've seen before include "satisfaction" , "Making good" , "Expiation of sin, penance" , "Making amends" , "'Penance, redemption (9)'" .)