Purely purely personal opinion, based on gut, emotional feeling and not on anything in the real world; I would say while I'd see nothing wrong whatsoever in the addition of cloves or any other more or less bizarre ingredient - it's all about experimentation and messing, right? <!-- s:) --><img src="{SMILIES_PATH}/icon_smile.gif" alt="

" title="Smile" /><!-- s:) --> - I think for the purposes of a Weiss beer it might be cheating. Again though, that's from a very, very "purist" (read: pedantic wench) kind of viewpoint though.
Admittedly I'm not entirely sure what the difference is supposed to be between a "Weiss" and a "Wit" other than the addition of spices in the latter, and the nationality of origin but if you were adding cloves to get a clovey hit to the beer, would that not make it more a Wit than a Weiss? Or perhaps we should just bite the bullet and call it a "Bán" <!-- s;) --><img src="{SMILIES_PATH}/icon_wink.gif" alt="

" title="Wink" /><!-- s;) --> <!-- s;) --><img src="{SMILIES_PATH}/icon_wink.gif" alt="

" title="Wink" /><!-- s;) -->