Attitude the ancestors started out with (6)

I believe the answer is:

stance

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'attitude' is the definition.
(I know that stance is a type of attitude)

I can't explain the remainder of the clue.

(Other definitions for stance that I've seen before include "driver preparing to strike" , "Attitude - taken by a golfer?" , "Attitude on the tee?" , "Position, at the tee perhaps" , "Attitude or way of standing" .)

I've seen this clue in the Evening Standard.

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