Came out top (4)
I believe the answer is:
acme
'top' is the definition.
(synonyms)
'came out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'came' is an anagram of 'ACME'.
(Other definitions for acme that I've seen before include "Summit - zenith" , "Culminating point" , "High point of excellence" , "Pinnacle" , "Highest point of excellence or achievement" .)