Paul Bunyan's blue ox (4)
I believe the answer is:
babe
'paul bunyan's blue ox' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for babe that I've seen before include "One of the little people" , "Very young child (often found in arms)" , "Ruth, for example" , "Nickname of George Herman Ruth" , "Term of endearment" .)