Character to eviscerate Nazarene (4)
I believe the answer is:
tone
'character' is the definition.
(I've seen this before)
'to eviscerate nazarene' is the wordplay.
'eviscerate' means to remove the middle letters (I've seen 'eviscerated' mean this (the word is disembowelled of its inside letters)).
'nazarene' with its centre removed is 'ne'.
'to'+'ne'='TONE'
(Other definitions for tone that I've seen before include "Note as in voice" , "Mood" , "Musical sound of note" , "Bodily firmness" , "Quality of sound, etc" .)