Expression of opinion theres nothing in wickedness (5)
I believe the answer is:
voice
'expression' is the definition.
(I know that voice is a class)
'nothing in wickedness' is the wordplay.
'nothing' becomes 'O' (looks like zero - 0).
'in' is an insertion indicator.
'wickedness' becomes 'vice' (I've seen this in another clue).
'o' inserted inside 'vice' is 'VOICE'.
'of opinion theres' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for voice that I've seen before include "Opinion; ability to speak" , "Sound produced in speaking" , "Spokesperson" , "eg Bass" , "Power of speech" .)