He goes for the gold (6)
I believe the answer is:
archer
'he goes for the gold' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'he goes for the gold' is the wordplay.
'he' becomes 'Arch'.
'goes for the gold' becomes 'er' (I can't explain this - if you can you should believe this answer much more).
'arch'+'er'='ARCHER'
Can you help me to learn more?
(Other definitions for archer that I've seen before include "Bowman - ex-candidate for London Mayor" , "Arrow shooter" , "man with weapon" , "Small insect" , "Arrows one sends" .)