Nobody has had a go

Nobody has had a go at the secret competition yet. OK, so it is a bit of a two-parter, the first part being that you have to find it. But it is on this page (assuming you are still reading this whilst this post is on the front page and not fallen off into the archive. In fact, you should even be able to find it in the archive if you look closely).
So go on – have a go. I know at least one regular reader of this site who should know the answer. And there is a *prize* after all!