Cruel or barbaric (7)
I believe the answer is:
inhuman
I believe this clue is a double definition.
'cruel' is the first definition.
(inhuman can mean cruel or inhumane)
'barbaric' is the second definition.
(I've seen this before)
(Other definitions for inhuman that I've seen before include "Savage, brutal" , "Cruel, bestial" , "diabolical ..." , "Animal" , "Callously cruel" .)