Intense repugnance (6)
I believe the answer is:
horror
'intense repugnance' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for horror that I've seen before include "Feeling of panic and dread" , "'Repugnance, revulsion (6)'" , "Intense and profound fear" , "Extreme fright and disgust" , "Shock; disgust" .)