Uncontrollable oil gush — hot and revolting (8)
I believe the answer is:
Here is my best explanation:
'revolting' is the definition.
'uncontrollable oil gush hot' is the wordplay.
'uncontrollable' indicates anagramming the letters (I've seen this in other clues).
'hot' becomes 'h'.
'oilgush' anagrammed gives 'ghoulis'.
'and' acts as a link.
(Other definitions for ghoulish that I've seen before include "Macabre", "Morbidly interested in death or disaster", "Morbid, horrible" and "Gruesome".)