I find it strangely unsettling that if I die, my Minecraft clan will never know what happened to me. I'll just vanish one day. They will spend some time trying to contact me but probably won't make a connection with anybody who can tell them what happened. And nobody who is sure to know about my death would know to contact them.
That's why you should write down some instructions for your family so they can let them know. It's probably a good idea to describe your relationship with your clan a littlebit, because they'd like to know, and so they can make better judgement on how to bring the news depending on how close you are with your clan members. Another good idea is to mention that "Uncle Joe probably knows how to log on to Minecraft and such" (/s/Joe/your favourite tech-savvy family member or friend/, of course)