Cackle fiendishly wearing north-eastern jewellery (8)
I believe the answer is:
necklace
'jewellery' is the definition.
(I know that Necklace is a necklace)
'cackle fiendishly wearing north-eastern' is the wordplay.
I cannot quite see how this works, but
an anagram of 'cackle' is 'ecklac' which is present in the answer.
'north' could be 'n' (abbreviation) and 'n' is found in the answer.
'eastern' could be 'e' and 'e' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for necklace that I've seen before include "Choker perhaps" , "decorative band" , "Jewellery worn around the neck" , "Item of jewellery" , "One may get stoned!" .)