Not conned by (4)
I believe the answer is:
onto
(Other definitions for onto that I've seen before include "To a position on (something)" , "(Moving) aboard" , "forward, with a destination" , "To the whole of (maths.)" , "To a place on" .)
I believe the answer is:
onto
(Other definitions for onto that I've seen before include "To a position on (something)" , "(Moving) aboard" , "forward, with a destination" , "To the whole of (maths.)" , "To a place on" .)