Displays old models (7)
I believe the answer is:
exposes
'displays' is the definition.
('expose' can be a synonym of 'display')
'old models' is the wordplay.
'old' becomes 'ex'.
'models' becomes 'poses' ('pose' can be a synonym of 'model').
'ex'+'poses'='EXPOSES'
(Other definitions for exposes that I've seen before include "Brings to light" , "Reveals" , "scandalous revelations?" , "Deprives of cover" , "Uncovers" .)