The Walt Disney Co. is hoping that Santa Claus will be clambering down the box-office's chimney this weekend to find family audiences waiting to greet him. But The Santa Clause 3: The Escape Clause doesn't have the family audience to itself. It will be competing against Paramount's animated Flushed Away from Britain's Aardman Entertainment, the company responsible for the Wallace & Gromit cartoons. Also vying for attention will be the Sacha Baron Cohen comedy Borat and last week's winner, the horror flick Saw III.