Traditional belief family role is changing (8)
I believe the answer is:
folklore
'traditional belief' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Maybe there's a link between them I don't understand?
'family role is changing' is the wordplay.
'family' becomes 'folk' (synonyms).
'is changing' is an anagram indicator.
'role' anagrammed gives 'lore'.
'folk'+'lore'='FOLKLORE'
Can you help me to learn more?
(Other definitions for folklore that I've seen before include "Stories and legends" , "Ancient customs and beliefs" , "Traditional beliefs and tales of community" , "Stories, traditions, etc., of a group of people" , "Traditional knowledge of a culture" .)