Nobleman's relative holding page's shiny coat (6,2,5)
I believe the answer is:
mother of pearl
'shiny coat' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'nobleman's relative holding page's' is the wordplay.
I cannot really see how this works, but
'relative' could be 'mother' (mother is a kind of relative) and 'mother' is found within the answer.
'page' could be 'p' and 'p' is found in the answer.
'nobleman' could be 'earl' (earl is a kind of nobleman) and 'earl' is found within the answer.
The remaining letters 'of' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for mother of pearl that I've seen before include "Nacre" , "shell liner" , "iridescent material" , "something in an oyster, perhaps" .)