Bishop has single skull, say (4)
I believe the answer is:
bone
'skull say' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'bishop has single' is the wordplay.
'bishop' becomes 'b' (abbreviation used in chess).
'has' means one lot of letters go next to another.
'single' becomes 'one' (similar in meaning).
'b'+'one'='BONE'
Can you help me to learn more?
(Other definitions for bone that I've seen before include "Skeleton material" , "Carpal or tarsal, for example" , "Skeleton component" , "Skeleton substance" , "Scapula, radius or tibia?" .)