Turn to list, thinking snitch left betraying nothing (11)
I believe the answer is:
unemotional
'turn to list thinking snitch' is the definition.
I can't judge whether this definition defines the answer.
'left betraying nothing' is the wordplay.
I cannot really understand how this works, but
'left' could be 'al' (I've seen this in other clues) and 'al' is found within the answer.
'nothing' could be 'o' (looks like zero - 0) and 'o' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for unemotional that I've seen before include "Without personal feelings" , "Cold" .)