Evil ways we all have (6)
I believe the answer is:
sinews
'we all have' is the definition.
I can't tell whether this defines the answer.
'evil ways' is the wordplay.
'evil' becomes 'sin' (synonyms).
'ways' becomes 'ews' (I can't justify this - if you can you should give a lot more credence to this answer).
'sin'+'ews'='SINEWS'
Can you help me to learn more?
(Other definitions for sinews that I've seen before include "Tough tissues joining muscles to bone" , "Tissues connecting muscles to bones" , "Tendons, ligaments" , "They connect muscle to bone" , "Strength" .)