"King of the Mountain", by Kate Bush.
I finally figured out who it is that I have been flashing on whenever I hear this song: it's John Martyn!
Which is perhaps not so absurd really, if you think about it. (Then again, I am the person who hears Captain Beefheart in Joanna Newsom.)
I have been listening to this, of course, in the wake of the potentially exciting news that Kate "might" be releasing some music in 2011.
Be still my beating heart.