Exposition or spotlight on a cultures expert (14)
I believe the answer is:
anthropologist
'cultures expert' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'exposition or spotlight on a' is the wordplay.
'or spotlight on a' can be anagrammed to 'ANTHROPOLOGIST'.
Though, I'm unsure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for anthropologist that I've seen before include "Possibly Margaret Mead" , "Customs investigator" , "Humanity student" , "Scientist" , "social observer" .)