Charge could be shocking (9)
I believe the answer is:
offensive
I believe this clue is a double definition.
'charge' is the first definition.
(thesaurus)
'be shocking' is the second definition.
(thesaurus)
'could' is the link.
(Other definitions for offensive that I've seen before include "See 8" , "Causing anger or resentment" , "Causing anger or annoyance" , "nasty in another part of speech" , "Insulting or repulsive" .)