Trifle (with) (3)
I believe the answer is:
toy
'trifle with' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for toy that I've seen before include "A child's plaything" , "Trifle with plaything?" , "One of spelt out words" , "Teddy or Dolly" , "Child's amusement" .)