Show an outdated attitude (6)
I believe the answer is:
expose
'show' is the definition.
(I know that expose is a type of bring out)
'an outdated attitude' is the wordplay.
'an outdated' becomes 'ex' (I can't explain this - if you can you should give a lot more credence to this answer).
'attitude' becomes 'pose' (attitude can mean a pose or stance).
'ex'+'pose'='EXPOSE'
Can you help me to learn more?
(Other definitions for expose that I've seen before include "Lay out to view" , "Uncover or unmask" , "Unmask or denounce" , "Bring into view" , "Reveal or unmask" .)