Based on the clue 'a pleasure carriage with a raised drivers seat or ...', what is the answer?

Based on the clue 'a playwright we are all born mad some remain so', what is the answer? What is associated with: a plaza in san francisco is named for this politician who was a city supervisor when he was sl… Based on the clue 'a pleasant means of amusement like a game of cards...', what is the answer? Based on the clue 'a pleasurable trip in an automobile especially whe...', what is the answer? Based on the clue 'a plectrum of a harpsichord or a porcupine part', what is the answer? Based on the clue 'a plentiful or overflowing quantity or supply', what is the answer? What is referred to by 'a plessor'? Based on the clue 'a plethora of hiking riding trails are in this vi...', what is the answer?