Can't stand content in kebab -- horrendous! (5)
I believe the answer is:
abhor
'can't stand' is the definition.
(if you abhor something you can't stand it)
'content in kebab horrendous' is the wordplay.
'content' indicates the answer is hidden within the clue (I've seen 'contents of' mean this).
'ABHOR' can be found hidden inside 'in kebab horrendous'.
(Other definitions for abhor that I've seen before include "cannot stand" , "Loathe, detest" , "Abominate" , "Detest, hate" , "Sea between Africa and Australia" .)