Native American chap working in A and E (6)
I believe the answer is:
apache
'native american' is the definition.
(I've seen this before)
'chap working in a and e' is the wordplay.
'working' is an anagram indicator.
'in' is an insertion indicator.
'and' is a charade indicator (letters next to each other).
'chap' with letters rearranged gives 'pach'.
'a'+'e'='ae'
'pach' inserted within 'ae' is 'APACHE'.
(Other definitions for apache that I've seen before include "Street ruffian" , "American Indian once found in Paris" , "American speech" , "Parisian gangster" , "Geronimo's people" .)