Some of it is awful, certainly a deep wound (5)
I believe the answer is:
ulcer
'wound' is the definition.
(thesaurus)
'some of it is awful certainly a deep' is the wordplay.
'ULCER' is hidden in amongst the letters.
But, I'm uncertain how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for ulcer that I've seen before include "Continuing source of pain" , "Stomach or mouth sore" , "cause of suffering" , "Cruel kind of body sore" , "Cruel kind of bodily sore" .)