As it's repaired, works OK (12)
I believe the answer is:
satisfactory
'ok' is the definition.
(I've seen this before)
'as it's repaired works' is the wordplay.
'repaired' indicates anagramming the letters.
'works' becomes 'factory' (factory is a kind of works**).
'as'+'its'='asits'
'asits' with letters rearranged gives 'satis'.
'satis'+'factory'='SATISFACTORY'
(Other definitions for satisfactory that I've seen before include "Good enough" , "Up to scratch" , "Fulfilling expectations" , "unexceptional" , "Acceptable - adequate" .)