Show how to cheat perhaps (5)
I believe the answer is:
teach
'show how' is the definition.
(I've seen this in another clue)
'cheat perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'cheat' with letters rearranged gives 'TEACH'.
'to' is the link.
(Other definitions for teach that I've seen before include "Give instruction to" , "Coach" , "show" , "Instruct, enlighten" , "Act as director" .)