Male driver sees to rotten turn? (12)
I believe the answer is:
testosterone
'male driver' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'sees to rotten turn?' is the wordplay.
'turn?' indicates an anagram (I've seen 'turn' mean this).
'sees'+'to'+'rotten'='seestorotten'
'seestorotten' with letters rearranged gives 'TESTOSTERONE'.
Can you help me to learn more?
(Other definitions for testosterone that I've seen before include "male driver?" , "Male sex hormone" , "stimulator of particular sexuality" , "It might make a man of you" .)