Backing restoration of a torn page (9)
I believe the answer is:
patronage
'backing' is the definition.
(I know that backing can be written as patronage)
'restoration of a torn page' is the wordplay.
'restoration of' indicates an anagram (the order of letters restored or reset).
'a'+'torn'+'page'='atornpage'
'atornpage' is an anagram of 'PATRONAGE'.
(Other definitions for patronage that I've seen before include "financial backing" , "The power to control privileges" , "Sponsorship - condescending manner" , "Condescension" , "Regular custom" .)