Nailed (4)
I believe the answer is:
aced
'nailed' is the definition.
(acing is a kind of nailing)
This is all the clue.
(Other definitions for aced that I've seen before include "Sailed through" , "Reached a golf hole in one shot" , "got a hole in one" , "passed with highest marks in US" , "Comprehensively beaten" .)