Rhetorician finds gold on a hill (6)
I believe the answer is:
orator
'rhetorician' is the definition.
(I know that rhetorician can be written as orator)
'gold on a hill' is the wordplay.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'on' means one lot of letters go next to another.
'hill' becomes 'tor' (tor is a kind of hill).
'or'+'a'+'tor'='ORATOR'
'finds' is the link.
(Other definitions for orator that I've seen before include "He addresses" , "A fluent public speaker" , "An impressive public speaker" , "A gifted public speaker" , "He lectures" .)