Repulsive tip of aromatic herb torn apart (9)
I believe the answer is:
abhorrent
'repulsive' is the definition.
(synonyms)
'tip of aromatic herb torn apart' is the wordplay.
'tip of' says to take the initial letters.
'apart' indicates an anagram.
The first letter of 'aromatic' is 'a'.
'herb'+'torn'='herbtorn'
'herbtorn' anagrammed gives 'bhorrent'.
'a'+'bhorrent'='ABHORRENT'
(Other definitions for abhorrent that I've seen before include "Detestable, really off-putting" , "execrable" , "Odious, being earthborn" , "noisome" , "far from agreeable" .)