Crossword Genius

Indigenous American's trousers not quite acceptable (7)

Ross

I believe the answer is:

chinook

'indigenous american's' is the definition.
(the Chinook are a Native American people)

'trousers not quite acceptable' is the wordplay.
'trousers' becomes 'chinos' (chinos are a type of trousers).
'not quite' means to remove the last letter.
'acceptable' becomes 'OK' (OK can mean acceptable or fine).
'chinos' with its final letter taken away is 'chino'.
'chino'+'ok'='CHINOOK'

(Other definitions for chinook that I've seen before include "What blows" , "North American wind, native or language" , "Arctic wind" , "nickname of US State" , "warm one" .)

I've seen this clue in The Guardian.
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