A powerful car tails off? My trip needs something much more powerful (9)
I believe the answer is:
astronaut
'a powerful car' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for astronaut that I've seen before include "Space explorer" , "high flier" , "Armstrong or Sharman, say" , "Buzz Aldrin, e.g." , "Space voyager" .)