Callous lord cheated outrageously (4-7)
I believe the answer is:
cold-hearted
'callous' is the definition.
(both can mean cruel)
'lord cheated outrageously' is the wordplay.
'outrageously' indicates an anagram.
'lord'+'cheated'='lordcheated'
'lordcheated' is an anagram of 'COLD-HEARTED'.
(Other definitions for cold-hearted that I've seen before include "Unfeeling" , "Unkind" , "Indifferent" .)