Offensive, disgusting (7)
I believe the answer is:
obscene
I believe this clue is a double definition.
'offensive' is the first definition.
(similar in meaning)
'disgusting' is the second definition.
(obscene can mean disgusting or indecent)
(Other definitions for obscene that I've seen before include "not decent" , "off colour?" , "Salacious" , "X-rated" , "Highly offensive" .)