Crossword Genius

In ancient customs rook fell disastrously (8)


I believe the answer is:


I'm a little stuck... Click here to teach me more about this clue!

'in ancient customs' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.

'rook fell disastrously' is the wordplay.
'disastrously' is an anagram indicator (I've seen this in other clues).
'rookfell' is an anagram of 'FOLKLORE'.

Can you help me to learn more?

(Other definitions for folklore that I've seen before include "Ancient customs and beliefs" , "Stories and legends" , "Stories, traditions, etc., of a group of people" , "Traditional knowledge of a culture" , "Traditional beliefs and tales of community" .)

I've seen this clue in The Sun.
Want a hint initially instead of a full solution? Install my app