"Toy Story” dinosaur (3)
I believe the answer is:
rex
'toy story dinosaur' 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 "Part of official title of a king" , "King's title" , "One in the palace" , "Dog's name; king" , "King (Latin); cat breed" .)