as-set members

hello i have an as-set that has some members, other as-sets. can i exclude some members from my as-set members? as-set: me members: as-set-1, as-set-2, as-set-3 as-set-3 has some members that i want to exlude; let's say as-set-xxx, is a member of as-set as-set-3 is there something like members: as-set-1, as-set-2, as-set-3 and not as-set-xxx ? thanks