"Peter Pan" pooch (4)
I believe the answer is:
nana
'peter pan pooch' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nana that I've seen before include "Fool; Zola heroine" , "Darling dog" , "Idiot" , "Old woman" , "Grandmother - dog in Peter Pan" .)