An ivory castle perhaps (8)
I believe the answer is:
chessman
This could be a double definition.
'an ivory' is the first definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'castle perhaps' is the second definition.
(I know that rook is a type of chessman)
Can you help me to learn more?
(Other definitions for chessman that I've seen before include "Eg, bishop, knight" , "Eg, bishop or rook" , "Playing piece" , "queen, perhaps" , "that's played on board" .)