Reveal an attitude no longer adopted (6)
I believe the answer is:
expose
'reveal' is the definition.
(I know that reveal can be written as expose)
'an attitude no longer adopted' is the wordplay.
I cannot quite understand how this works, but
'attitude' could be 'pose' (attitude can mean a pose or stance) and 'pose' is located in the answer.
'no longer' could be 'ex' (prefix meaning former or onetime) and 'ex' is present in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for expose that I've seen before include "Reveal, uncover" , "Abandon" , "display" , "Reveal or unmask" , "Lay bare" .)