Bishop has single supporter (4)
I believe the answer is:
bone
'supporter' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
'bishop has single' is the wordplay.
'bishop' becomes 'B' (abbreviation for bishop in chess).
'has' means one lot of letters go next to another.
'single' becomes 'one' (a single thing - only one).
'b'+'one'='BONE'
Can you help me to learn more?
(Other definitions for bone that I've seen before include "Eg, rib" , "Eg, radius or stirrup" , "Skeleton substance" , "Part of skeleton" , "#Close to it is risque" .)