Dislikes sending back a portion of Lebanese tahini (5)
I believe the answer is:
'dislikes' is the definition.
(hating is a kind of disliking)
'sending back a portion of lebanese tahini' is the wordplay.
'sending back' says the letters should be written backwards.
'a portion of' indicates the answer is hidden within the clue.
'setah' is hidden in the letters of 'lebanese tahini'.
'setah' backwards is 'HATES'.
(Other definitions for hates that I've seen before include "passionate feelings", "Loathes", "can't stand", "Abhors", "Despises".)