Reportedly charge native Americans (5)
I believe the answer is:
sioux
'native americans' is the definition.
(I've seen this before)
'reportedly charge' is the wordplay.
'reportedly' shows a homophone (sound like).
'charge' becomes 'sue' (I've seen this before).
'sue' is a homophone of 'SIOUX'.
(Other definitions for sioux that I've seen before include "Native American tribe" , "Native Americans of the northern US" , "Native American of Minnesota, perhaps" , "Native American people" , "North American people" .)