A model attitude (4)
I believe the answer is:
pose
I believe this clue is a double definition.
'a model' is the first definition.
(model can mean to pose)
'attitude' is the second definition.
(attitude can mean a pose or stance)
(Other definitions for pose that I've seen before include "Present (problem), sit" , "Affectation" , "position" , "Sit as model" , "Sit (for an artist)" .)