Misc: [pot luck] whixh expensive red spice is extracted from the crocus flower?

Questions

Name Ladysmith Black Mambazo's chart-topping album of 1986?

Which comedian, born in 1893, was 'The man who found the Lost Chord'?

How does a wine become a "fortified" wine?

What title did Zola give to the letter he wrote to the newspaper L'Aurore in 1898?

Which former drama critic of the Observer devised the revue "Oh Calcutta"?