Maine journal rebuffed one with feet of clay (5)
I believe the answer is:
golem
'one with feet of clay' is the definition.
I can't judge whether this definition defines the answer.
'maine journal rebuffed' is the wordplay.
'maine' becomes 'me' (abbreviation).
'journal' becomes 'log' (log can mean a journal or diary).
'rebuffed' says the letters should be written in reverse.
'me'+'log'='melog'
'melog' backwards is 'GOLEM'.
Can you help me to learn more?
(Other definitions for golem that I've seen before include "Animated figure" , "something robotic" , "robot" , "Artificial human of Jewish legend" , "(In Jewish legend) a clay figure brought to life" .)