Deceive through greater ingenuity (6)
I believe the answer is:
outwit
'deceive through greater ingenuity' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for outwit that I've seen before include "Mentally get the better of" , "To fox" , "Defeat by superior ingenuity" , "Be too clever for, get the better of" , "Intellectually get the better of" .)