Beaver Friend of Rufus Ruffcat in Wacky Races
Puzzle 13 of Preparing for baby Pack
Question is: Beaver Friend of Rufus Ruffcat in Wacky Races
and the answer is: SAWTOOTH
Word Meaning:
SAWTOOTH — A tooth of a saw: any of its series of projections, each with a cutting edge.
Definitions from Wiktionary.