Phobias: Fear of clothing?

Questions

What was the first name of 'Duke' Ellington?

What was the name of the Russian submarine that perished with all her crew on board last year?

In which film, when advised that the girl he was chasing was actually a man, did the actor Joe E Brown say 'Well nobody's perfect'?

Leo Argyle, Rachel Argyle and Donald Craig are all characters from which Agatha Christie novel?

'Look at me, I'm as helpless as a kitten up a tree' begins which Burke & Garner song?