Cheat deviously and inform (5)
I believe the answer is:
teach
'inform' is the definition.
(teaching is a kind of informing)
'cheat deviously' is the wordplay.
'deviously' indicates an anagram (I've seen this in other clues).
'cheat' with letters rearranged gives 'TEACH'.
'and' acts as a link.
(Other definitions for teach that I've seen before include "Impart skills or 3 down" , "Educate 4 across" , "Provide learning to" , "Convey knowledge to students" , "train" .)