Display old stance (6)
I believe the answer is:
expose
'display' is the definition.
(synonyms)
'old stance' is the wordplay.
'old' becomes 'ex'.
'stance' becomes 'pose'.
'ex'+'pose'='EXPOSE'
(Other definitions for expose that I've seen before include "Reveal or unmask" , "article on scandal?" , "Abandon" , "Bring into view" , "Disclose" .)