Based on the clue 'a disco anthem first i was afraid i was petrified', what is the answer?

Based on the clue 'a director of londons national gallery he introduc...', what is the answer? What is referred to by 'a dirty shabby bar'? Based on the clue 'a disappointing end after a big buildup', what is the answer? What is associated with: a disastrous economic program called the great leap forward was begun in this country in 1958? Based on the clue 'a discophile doesnt particularly like discos but d...', what is the answer? Based on the clue 'a discount is deducted from the price before purch...', what is the answer? What is referred to by 'a discount on shamu'? What is referred to by 'a discriminating gumshoe'?