Courage; viscera (4)
I believe the answer is:
guts
I believe this clue is a double definition.
'courage' is the first definition.
(I know that guts is a type of fortitude)
'viscera' is the second definition.
(thesaurus)
(Other definitions for guts that I've seen before include "stamina!" , "Intestines; bravery" , "Stomach" , "Cleans - bottle" , "Inside - bottle!" .)