No hens in Lancashire? It's a cultural thing! (6)
I believe the answer is:
racial
'no' is the definition.
Both the definition and answer are adjectives. Perhaps there's a link between them I don't understand?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for racial that I've seen before include "Related to genetically different groups of people" , "Relating to differences between nationalities" , "Of particular people or colour, as with prejudice" , "Relating to different branches of humanity" , "Relating to ethnicity" .)