Characteristically male - heartless and savage (4)
I believe the answer is:
maul
'savage' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for maul that I've seen before include "Claw - handle clumsily" , "Batter - lacerate" , "Handle roughly; loose scrum" , "Treat roughly eg with claws" , "Treat roughly or savagely" .)