Hate or abhor (7)
I believe the answer is:
despise
This clue is a double definition.
'hate' is the first definition.
(I know that despise is a more specific form of the action hate)
'abhor' is the second definition.
(I've seen this before)
(Other definitions for despise that I've seen before include "Hold in contempt" , "Scorn; loathe" , "Loathe, look down on" , "Hate, disdain" , "Abhor" .)