Dinosaur in "Toy Story" (3)
I believe the answer is:
rex
'dinosaur in toy story' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rex that I've seen before include "Dog's name; king" , "See 6" , "King - Harrison?" , "Part of official title of a king" , "King (L.)" .)