Based on the clue 'also known as butter beans they were prior to bein...', what is the answer?

Based on the clue 'also known as an alligator pear', what is the answer? Based on the clue 'also known as an arbalest this weapon can use a cr...', what is the answer? Based on the clue 'also known as an egyptian cobra', what is the answer? Based on the clue 'also known as beaubourg the paris center for the c...', what is the answer? Based on the clue 'also known as cheops he put up the great pyramid', what is the answer? Based on the clue 'also known as chickpeas these beans are the main i...', what is the answer? Based on the clue 'also known as cos lettuce its traditionally found ...', what is the answer? Based on the clue 'also known as dens sapientiae these can be a pain ...', what is the answer?