Penalise (6)
I believe the answer is:
punish
'penalise' is the definition.
(I know that penalise can be written as punish)
This is the entire clue.
(Other definitions for punish that I've seen before include "Like wordplay in speech" , "Flog" , "exact retribution" , "Possibly fine" , "Inflict a penalty upon" .)