Withering ribaldry in game shows (6)
I believe the answer is:
drying
'withering' is the definition.
(thesaurus)
'ribaldry in game shows' is the wordplay.
'shows' says the answer is hidden in the clue.
'DRYING' is hidden in the letters of 'ribaldry in game'.
(Other definitions for drying that I've seen before include "Losing moisture" , "(Of actor) forgetting one's lines" , "Parching" , "Desiccating" , "Removing moisture from" .)