Examine and repair (8)
I believe the answer is:
overhaul
'examine and repair' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for overhaul that I've seen before include "service" , "'Repair, renovate (8)'" , "Test and repair - pass" , "Take apart to examine and repair if necessary" , "Recondition" .)