I wish there was an option that you could set a status on your profile so that only your clan can see it. So if they tap your name and your profile pops up, they can see whatever status you wrote. This would be extremely helpful when letting your clan know when your shield expires or if you do not wish to receive resources.
You could tell your clan when your shield expires and other things like that in the clan diplomacy. As for the request to have a status on your profile that you can update, I'm sure that they will add a feature like that in the near future, but one that EVERYONE can see. As they already have this feature in some of their other games like "Kingdoms At War". For right now however you can go to your profile settings on this forum and edit the status on your forum profile.
lol, don't do the diplomacy board, everyone can see it. Haha. So if you want clan mates and enemies to know when your shield expires, do it there.