Return to original condition (7)
I believe the answer is:
restore
'return to original condition' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for restore that I've seen before include "Give back - return to former state" , "Return to original condition" , "Repair, put back" , "Refurbish" , "Renew, repair; give back" .)