Entrapment: A cop handing a kid a can of spray paint to a kid and telling them to spray a wall. When the kid does the cop arrests him for doing so.
Sting: A cop sits in a car across the street from a pawn shop that he believes will get robbed that night. When the criminal shows up to rob it and does so the cop arrests the thug.
You don't use a hitch to connect a trailer to the vehicle - that's a tow bar & tow ball.
I'm from NZ and didn't find any definition of hitch to match the clue - is it slang in other countries for the equipment used to connect a trailer to the vehicle?