Train to cheat, perhaps (5)
I believe the answer is:
teach
'train' is the definition.
(I know that train is a more specific form of the action teach)
'cheat perhaps' is the wordplay.
'perhaps' is an anagram indicator.
'cheat' anagrammed gives 'TEACH'.
'to' is the link.
(Other definitions for teach that I've seen before include "Impart skills or 3 down" , "Cheat (anag)" , "Educate 4 across" , "show" , "Coach" .)