Cheat managed to train (5)
I believe the answer is:
teach
'to train' is the definition.
(I've seen this before)
'cheat managed' is the wordplay.
'managed' indicates anagramming the letters.
'cheat' is an anagram of 'TEACH'.
(Other definitions for teach that I've seen before include "Impart skills or 3 down" , "Provide learning to" , "Give instruction to" , "Work with pupils" , "Work in school" .)