Sardonic, satiric (6)
I believe the answer is:
ironic
This clue is a double definition.
'sardonic' is the first definition.
(I've seen this before)
'satiric' is the second definition.
(thesaurus)
(Other definitions for ironic that I've seen before include "Suggesting the opposite for humorous effect" , "not as you'd expect" , "Using the opposite of the truth for humorous effect" , "Perverse or sarcastic in expressing opinion (6)" , "Paradoxical or sarcastic" .)