Based on the clue 'as a prince this prussian embraced the arts music...', what is the answer?

Based on the clue 'as a prefix this single letter can mean on in to o...', what is the answer? What is associated with: as a presenter at the 1942 oscars this composer announced himself as the winner for best song… Based on the clue 'as a presidential nominee this decorated wwii bomb...', what is the answer? What is associated with: as a press secretary this mississippi native was often a spokesman for us presidents in the 19… Based on the clue 'as a princess queen margrethe ii of denmark studie...', what is the answer? Based on the clue 'as a prisoner of emperor claudius valentines fatef...', what is the answer? What is associated with: as a producer he had several no 1 hits in 1997 including his own cant nobody hold me down? Based on the clue 'as a producer he was smart enough to hire himself ...', what is the answer?