Based on the clue 'classed as a subphylum of the chordates they make ...', what is the answer?

Based on the clue 'class a doors have a 3 hour rating for enduring th...', what is the answer? Based on the clue 'class of a pro boxer topping out at 160 pounds', what is the answer? Based on the clue 'class of crime more serious than a misdemeanor wit...', what is the answer? Based on the clue 'class of instruments to which the flute belongs', what is the answer? Based on the clue 'classes at the university of quebec are taught in ...', what is the answer? What is associated with: classic 1930 movie in which youd hear mother of mercy is this the end of rico? What is associated with: classic 1950 film that includes the line all right mr de mille im ready for my close up? Based on the clue 'classic 3 word palindrome that could have been the...', what is the answer?