Novelist Vidal (4)
I believe the answer is:
gore
'novelist vidal' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for gore that I've seen before include "Poetic blood from Al?" , "Showing guts" , "Blood; stab with tusk" , "Bloodshed" , "stuff from part of Kensington" .)