Based on the clue 'a popular middle english lyric begins sumer is icu...', what is the answer?

Based on the clue 'a popular koan or meditation subject or zen buddhi...', what is the answer? Based on the clue 'a popular london scientist medical man by suicide...', what is the answer? Based on the clue 'a popular louisiana appetizer crawfish tails that ...', what is the answer? Based on the clue 'a popular merit badge this organization gives is f...', what is the answer? Based on the clue 'a popular nickname of this state comes from a plan...', what is the answer? Based on the clue 'a popular pasadena museum bears the name of this b...', what is the answer? Based on the clue 'a popular performer at aquariums this dolphin is n...', what is the answer? What is referred to by 'a popular pet gato'?