Based on the clue 'a craze in the 50s these bunkers were built in cas...', what is the answer?

Based on the clue 'a cravat soiree or an old west term for a hanging', what is the answer? What is referred to by 'a craven poltroon'? Based on the clue 'a crayola made from synthetic fabric', what is the answer? What is associated with: a craze for this flower developed in holland in 1634 with single bulbs fetching high prices? Based on the clue 'a creature of the order cetacea a small game bird', what is the answer? Based on the clue 'a creature that eats both animals plants is descr...', what is the answer? Based on the clue 'a creature that expels water through a siphon is c...', what is the answer? Based on the clue 'a cree word meaning he makes grease gives us the n...', what is the answer?