Retribution in relation with English people backed (7)
I believe the answer is:
nemesis
'retribution' is the definition.
(thesaurus)
'relation with english people backed' is the wordplay.
'relation' becomes 'sis' (sis is a kind of relation**).
'with' is a charade indicator (letters next to each other).
'english' becomes 'e' (abbreviation).
'people' becomes 'men' (man is a kind of person).
'backed' is a reversal indicator.
'e'+'men'='emen'
'emen' backwards is 'neme'.
'sis' put after 'neme' is 'NEMESIS'.
'in' is the link.
(Other definitions for nemesis that I've seen before include "enemy" , "Come-uppance" , "Avenging deity" , "Unbeatable rival" , "Goddess of retribution in Greek mythology" .)