Last Christmas Synopsis

With less than a month to go, the BBC has released the official synopsis for this year’s Christmas special.:

The Doctor and Clara face their Last Christmas. Trapped on an Arctic base, under attack from terrifying creatures, who are you going to call? Santa Claus!

Is it just me, or does that sound like the end of Clara to you?  I find it strange that the companion would be in the Christmas special as the Doctor has typically been without her/him for most years in recent memory, but if they’re doing away with Clara this may be an interesting time to do it.  Thoughts?