Folk out in the cold (6)
I believe the answer is:
ethnic
'folk' is the definition.
'out in the cold' is the wordplay.
'out' indicates an anagram.
'cold' becomes 'c' (eg on taps).
'in'+'the'='inthe'
'inthe' is an anagram of 'ethni'.
'ethni'+'c'='ETHNIC'
(Other definitions for ethnic that I've seen before include "Etch in (anag.)" , "Of a way of living by a distinctive group" , "Relating to a cultural tradition" , "To do with racial group or culture" , "Of groups of people with common customs" .)