John, whose hairstyle could take any form (6)
I believe the answer is:
bunyan
'john' is the definition.
Both the definition and answer are singular nouns.
Maybe they are linked in a way I don't understand?
'hairstyle could take any form' is the wordplay.
I cannot quite understand how this works, but
'hairstyle' could be 'bun' and 'bun' is present in the answer.
an anagram of 'any' is 'yan' which is located in the answer.
No letters remain.
This explanation may well be incorrect...
'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" .)