Based on the clue 'a corporal or sergeant in a position requiring lea...', what is the answer?

What is referred to by 'a cordovan bird plume'? Based on the clue 'a corned beef sauerkraut sandwich on rye', what is the answer? Based on the clue 'a cornhusker chemist might know the symbol of this...', what is the answer? Based on the clue 'a coroner doesnt have to be a physician unlike the...', what is the answer? Based on the clue 'a correct response on seeing these initial chara...', what is the answer? What is associated with: a corrections museum in trenton new jersey contains the chair in which he was executed in 1936? Based on the clue 'a corridor or to drag away a load', what is the answer? Based on the clue 'a corruption of ordinary it means mean', what is the answer?