Deceive the young? (3)
I believe the answer is:
kid
I believe this is a double definition.
'deceive' is the first definition.
(I know that kid is a more specific form of the action befool)
'the young?' is the second definition.
(thesaurus)
(Other definitions for kid that I've seen before include "Young animal or child" , "Schoolboy" , "To fool; young animal" , "Deceive - child" , "Tease; hoodwink" .)