Pass an examination (8)
I believe the answer is:
overhaul
I believe this clue is a double definition.
'pass' is the first definition.
(I've seen this before)
'an examination' is the second definition.
(thesaurus)
(Other definitions for overhaul that I've seen before include "Outpace or renovate" , "Test and repair - pass" , "Check-up" , "Inspect and repair" , "Pass - examination" .)