Cannot impose change in financial restitution (12)
I believe the answer is:
compensation
'financial restitution' is the definition.
(a financial payment)
'cannot impose change' is the wordplay.
'change' indicates an anagram.
'cannot'+'impose'='cannotimpose'
'cannotimpose' is an anagram of 'COMPENSATION'.
'in' is the link.
(Other definitions for compensation that I've seen before include "Amends" , "Adjustment" , "cash for injury" , "damages" , "An award in recognition of a loss" .)