Best colour? (5)
I believe the answer is:
cream
This could be a double definition.
'best' is the first definition.
(as in 'the cream of the crop')
'colour?' is the second definition.
The answer and definition can be both groups as well as being singular nouns.
Maybe there's an association between them I don't understand?
Can you help me to learn more?
(Other definitions for cream that I've seen before include "It rises to the top, the best" , "Pick - fatty part of milk" , "Best - substitute for shaving soap" , "treat for cat?" , "Fat-rich part of milk" .)