Hi, Rusty!
Yes, I know Don McLean's "American Pie"....I should certainly have been able to parse that clue, shouldn't I?
Now I am not sure about Tennyson's title - I rather think it is something to do with his being created a hereditary Baron.
Barons are known as Lord Whatever, (sometimes?) preceded by their forename.
Hence, Alfred, Lord Tennyson.
You will miss seeing Katie Walsh in action, with her being such a familiar and popular figure on the horseracing scene.
Was there any particular reason for her retirement?
She is certainly going out on a high!
I see that the new royal baby is to be Louis Arthur Charles.
(My grandfather was an Arthur!)