Bring back restriction, say (9)
I believe the answer is:
reinstate
'bring back' is the definition.
(I've seen this before)
'restriction say' is the wordplay.
'restriction' becomes 'rein' (I've seen this before).
'say' becomes 'state' ('state' can be a synonym of 'say').
'rein'+'state'='REINSTATE'
(Other definitions for reinstate that I've seen before include "Give back" , "Bring back" , "Re-establish" , "Restore to a former condition" , "Restore to former post" .)