Is it a non runner in the race? (6)
I believe the answer is:
nation
'the race?' is the definition.
(both can mean a national or ethnic group)
'is it a non runner' is the wordplay.
'it a non' anagrams to 'NATION'.
However, I am not clear how the anagram is indicated.
'in' is the link.
Can you help me to learn more?
(Other definitions for nation that I've seen before include "Body of people united by their homeland" , "Anoint (anag)" , "People of common culture or descent" , "The Birth of a -, D.W. Griffiths film" , "Race" .)