Speaker finds gold by a hill (6)
I believe the answer is:
Here is my best explanation:
'speaker' is the definition.
(orator is a kind of speaker)
'gold by a hill' is the wordplay.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'by' means one lot of letters go next to another.
'hill' becomes 'tor' (tor is a kind of hill).
'finds' is the link.
(Other definitions for orator that I've seen before include "Speaker", "He addresses", "An eloquent public speaker", "A skilled public speaker", "One who holds forth", "Skilled public speaker", "A fluent public speaker", "One making one across", "A Rhetorical talker or speech-maker" and "He lectures".)