Expose to public derision (7)
I believe the answer is:
pillory
'expose to public derision' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pillory that I've seen before include "place of punishment" , "Expose to public derision" , "Publicly ridicule" , "Assail; old punishment frame" , "Expose to public ridicule" .)