In order to get this achievement you need to complete a 'Beat Up Event' which is denoted by the Clenched Fist icon on the map, go to the woman and press
to speak to her, she will give you the location of her husband who you must go and beat up for the achievement
using your fists only.
Note: The first mission where you beat up Claudia's boyfriend does not count but Beat Up events will be unlocked after this point.