Detested, loathed (8)
I believe the answer is:
abhorred
This clue is a double definition.
'detested' is the first definition.
(abhorring is a kind of detesting)
'loathed' is the second definition.
('abhor' can be a synonym of 'loathe')
(Other definitions for abhorred that I've seen before include "Detested, loathed" , "Really detested" , "Drab hero being loathed" , "very unpopular" , "Hated" .)