Detest drab horticulture displays (5)
I believe the answer is:
abhor
'detest' is the definition.
(abhorring is a kind of detesting)
'drab horticulture displays' is the wordplay.
'displays' indicates a hidden word (part of the clue displays the answer).
'ABHOR' is hidden within 'drab horticulture'.
(Other definitions for abhor that I've seen before include "Hate or dislike intensely" , "Regard with disgust and hatred" , "Find horrible" , "Reject" , "Detest, hate" .)