1) Alex boncayao brigade 2) Rpa-abb 3) Terrorist group 4) Terrorist organization 5) Warp yarn 6) Yarn made from this wool Found on https://www.crosswordclues.com/clue/abb
Abb (ăb) noun [ Anglo-Saxon āweb , āb ; prefix a- + web . See Web .] Among weavers, yarn for the warp. Hence, abb wool is wool for the abb . Found on http://www.encyclo.co.uk/webster/A/2