Hate sailor to have horrid part (5)
I believe the answer is:
abhor
'hate' is the definition.
(abhorring is a kind of hating)
'sailor to have horrid part' is the wordplay.
'sailor' becomes 'abor' (I can't explain this - if you can you should give a lot more credence to this answer).
'to have' means one lot of letters goes inside another.
'part' suggests taking the first letters.
The initial letter of 'horrid' is 'h'.
'abor' going around 'h' is 'ABHOR'.
Can you help me to learn more?
(Other definitions for abhor that I've seen before include "Execrate" , "can't stand" , "Regard with repugnance" , "Dislike very much" , "Sea between Africa and Australia" .)