Clamour for colour (3)
I believe the answer is:
This could be a double definition.
'clamour' is the first definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'for colour' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for hue that I've seen before include "'Pigment, colour (3)'" , "Tint, shade" , "complexion" , "Delicate shade" , "Shade, aspect; Vietnam port" .)