Face attack brutally (3)
I believe the answer is:
mug
This could be a double definition.
'face' is the first definition.
(informal term for face)
'attack brutally' is the second definition.
'mug' can be an answer for 'attack' (to mug someone is to attack and rob them). I'm not sure about the 'brutally' bit.
Can you help me to learn more?
(Other definitions for mug that I've seen before include "Cup; stupid person" , "Make a face" , "Tankard" , "Sucker - drinking vessel" , "Fall guy" .)