Criticise show again (7)
I believe the answer is:
reprove
I believe this is a double definition.
'criticise' is the first definition.
(reproving is a kind of criticizing)
'show again' is the second definition.
('prove' is an answer for 'show' so perhaps 'reprove' is OK for 'show again')
(Other definitions for reprove that I've seen before include "Criticise" , "carpet" , "tick off" , "Admonish" , "Scold" .)