There are three words in the English language with the letters "shion" in them. One is "fashion" the second is "cushion". What is the third?
Don't worry - or give in - if the answer doesn't come promptly; for most of us the word is likely to take months to enter our consciousness.
I recently promised a friend to leave the answer in an envelope if I died before she worked it out. She was as pleased as Punch that I did not let on - (and, die before she got the answer!)