Sad as Peter? (4)
I believe the answer is:
blue
This might be a double definition.
'sad' is the first definition.
(similar in meaning)
'peter?' is the second definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'as' acts as a link.
Can you help me to learn more?
(Other definitions for blue that I've seen before include "in Oxford, it's dark" , "adult" , "Colour - smutty" , "This could be royal or navy" , "Dirty" .)