He writes of gold going to hammer thrower (6)
I believe the answer is:
author
'he writes' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'gold going to hammer thrower' is the wordplay.
'gold' becomes 'Au' (Au is the chemical symbol for gold).
'going to' means one lot of letters go next to another.
'hammer thrower' becomes 'Thor' (the Norse god Thor wields a hammer).
'au'+'thor'='AUTHOR'
'of' is the link.
Can you help me to learn more?
(Other definitions for author that I've seen before include "Originator" , "Literary creator" , "Originate" , "Professional writer" , "Ford, for example" .)