Offensive show covering Hell's inner regions (10)
I believe the answer is:
indelicate
'offensive' is the definition.
(thesaurus)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for indelicate that I've seen before include "Rude - tasteless" , "Coarse" , "Saucy" , "lacking taste" , "Rather rude" .)