Race the eccentric run in mostly (6)
I believe the answer is:
ethnic
'race' is the definition.
(I've seen this before)
'the eccentric run in mostly' is the wordplay.
'eccentric' indicates anagramming the letters.
'run' indicates anagramming the letters (I've seen this in other clues).
'mostly' becomes 'c' (I can't explain this - if you can you should believe this answer much more).
'the' with letters rearranged gives 'eth'.
'in' anagrammed gives 'ni'.
'eth'+'ni'+'c'='ETHNIC'
Can you help me to learn more?
(Other definitions for ethnic that I've seen before include "Denoting the cultural traditions of a group" , "Having a common race or cultural tradition" , "Relating to cultures" , "Of the distinct ways of living of a particular group of people" , "Relating to a particular racial group" .)