It is missing from violent piece of fiction (5)
I believe the answer is:
novel
'fiction' is the definition.
(I know that novel is a type of fiction)
'it is missing from violent piece' is the wordplay.
'is missing from' suggests deleting specific letters.
'piece' indicates anagramming the letters (I've seen 'pieces' mean this (the same pieces in a new order)).
'violent' with 'it' taken away is 'volen'.
'volen' with letters rearranged gives 'NOVEL'.
'of' is the link.
(Other definitions for novel that I've seen before include "literary work" , "Unusual; book" , "Volume of prose fiction" , "New; original" , "Innovative" .)