John, whose hairstyle could take any form (6)
I believe the answer is:
bunyan
'john' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?
'hairstyle could take any form' is the wordplay.
I cannot quite see how this works, but
'hairstyle' could be 'bun' and 'bun' is found within the answer.
an anagram of 'any' is 'yan' which is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'whose' acts as a link.
Can you help me to learn more?
(Other definitions for bunyan that I've seen before include "John . . . . . . wrote 'The Pilgrim's Progress'" , "John ... wrote 'The Pilgrim's Progres'" , "author John" , "The Pilgrim's Progress author, d. 1688" , "Writer" .)