Snake now more than half twisted (7)
I believe the answer is:
serpent
'snake' is the definition.
(synonyms)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for serpent that I've seen before include "Snake - old wind instrument" , "Tempting" , "Malicious person" , "Eve's tempter" , "Devil of a snake" .)