Kicked?

Hello gang!

Had a bit of time away from the game over the Christmas period as I had some family issues. I logged back in today and it would appear I've been kicked from the clan chat?

Have I done something or was there just a major clear out?

Well a kick usually lasts 1 hour..
Sometimes as a guest Jagex just randomly boots you, it is just a matter of rejoining

If you instead think that you were banned however, did you perhaps attempt to join the Friends Chat instead? Because that one is closed, guide on how to join clan chat here:
https://www.osrsadvice.com/t5380-joining-the-clan-chat