Notice abandoning good for evil (3)
I believe the answer is:
sin
'evil' is the definition.
(thesaurus)
'notice abandoning good' is the wordplay.
'notice' becomes 'sign' (I've seen this before).
'abandoning' suggests deleting specific letters.
'good' becomes 'g' (abbreviation).
'sign' with 'g' taken out is 'SIN'.
'for' is the link.
(Other definitions for sin that I've seen before include "Fall from grace" , "Mortal offence" , "Misdeed" , "Wrongdoing" , "Evil" .)