As usual I am joining this thread late. I've entered the answers to every clue but am now stuck.
Firstly, I can't work out the song title. Secondly, are real words formed on replacing 8dn? (I can see the actor's name so formed but am struggling with the rest). And as for the perimeter, all I can see is that it will read the same in both directions from the top left...
Any help would be gratefully received!