function mouse_event() 
{
  if (event_type == EVENT_CLICK) 
  {
    //entity has been clicked! do whatever you want to do!
  }
}

function entity_event()
{
  if (event_type == EVENT_CLICK) 
  {
    ent_remove(me);
  }
}

action entity_action()
{
  my.emask |= ENABLE_CLICK;
  my.event = entity_event;
}