You should use 2 queries for this:
$excluded = query_posts( array(
'meta_key=> 'clpr_excoupon';
'meta_value' => '0'
) );
//$paged = (get_query_var('paged')) ? get_query_var('paged') : 1;
query_posts( array(
'post__not_in => $excluded;
'post_type' => APP_POST_TYPE,
'post_status' => 'publish',
APP_TAX_STORE => $term->slug,
'ignore_sticky_posts' => 1,
'posts_per_page' => -1,
//'paged' => $paged
) );
with this code you will get all the posts that have the clpr_excoupon with value 1 :)
Hope this helps...
Cheers, Mile