King in jumper, say, returned fashion adornment for crown (7)
I believe the answer is:
topknot
'for crown' is the definition.
(thesaurus)
'king in jumper say returned fashion' is the wordplay.
'king in jumper' becomes 'top' (I can't explain this - if you can you should give a lot more credence to this answer).
'say' shows a homophone (sound like).
'returned' says the letters should be written backwards.
'fashion' becomes 'ton' (term for style or fashion).
'ton' reversed gives 'not'.
'not' sounds like 'knot'.
'top'+'knot'='TOPKNOT'
'adornment' acts as a link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for topknot that I've seen before include "Decorative ribbon worn on top of head" , "Bow in hair" , "Crest of hair or feathers on the crown of the head" , "Tuft or crest on crown of head" , "Hairpiece" .)