Pixar title fish (4)
I believe the answer is:
nemo
'pixar title fish' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for nemo that I've seen before include "commander for the Nautilus" , "- me impune lacessit (motto of Scotland)" , "Jules Verne captain" , "Jules Verne's submarine captain" , "Fish sought in film" .)