The world's greatest swimmer (4,5)
I believe the answer is:
blue whale
This clue might be a double definition.
'the world's' is the first definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'greatest swimmer' is the second definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
Can you help me to learn more?
(Other definitions for blue whale that I've seen before include "World's largest animal" , "World's largest mammal" , "Largest living animal" , "there's nothing bigger" .)