Attitude the ancestors started out with (6)
I believe the answer is:
stance
'attitude' is the definition.
(stance is a kind of attitude)
I don't understand the remainder of the clue.
Can you help me to learn more?
(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" .)