The most common and most likely answer to this crossword clue is the 10 letter word ABOMINATES
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The straight part
We know that "Despises" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case despises = abominates.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ABOMINATES mean?
ABOMINATES verb- To feel disgust towards; to loathe or detest thoroughly; to hate in the highest degree, as if with religious dread.
- To dislike strongly.