Appalling (7)
'appalling' is the definition.
(abysmal can mean terrible)
This is all the clue.
(Other definitions for abysmal that I've seen before include "Extreme and deplorable as ignorance may be" , "Dreadful" , "Very bad or limitless" , "Appallingly bad" , "Deplorable, extremely bad - say ignorance" .)
'appalling' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for atrocious that I've seen before include "Terrible" , "Awful" , "Horrifying" , "Appallingly bad" , "Shocking" .)
'appalling' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for horrendous that I've seen before include "Horrific" , "Ghastly" , "Criminal" , "Dreadful" , "Absolutely awful" .)
'appalling' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for awful that I've seen before include "Extremely bad or unpleasant" , "Dreadful, nasty" , "Fearsome" , "pants" , "shocking" .)