Deliberately deceive (3,2)
I believe the answer is:
lie to
'deliberately deceive' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lie to that I've seen before include "Remain motionless" , "(Of a ship) come almost to a stop going into the wind" , "Misinform" , "Become stationary (naut.)" , "ship's to show no sign of movement" .)