Similiar to which weight?

We like Oxtail and Farao a lot (too much?) here.

> typefaces similar to Clarendon?

For what purpose and are you looking for any particular weight or style or a complete range of weights?

Aurora by Linotype

Belizio by Font Bureau

Corona by Linotype

Excelsior by Linotype

Ionic No. 5 by Linotype

News 701 by Bitstream

News 702 by Bitstream

...and any Typewriter derivative font (distressed or otherwise) will likely put you in the ballpark.

Sutro by Jim Parkinson