Other crossword clues for answer "ADDN"ADDNSupplement (abbr.)Bldg. annexArith. class lessonAnnex: Abbr.Annex, for instance: Abbr.Math process: Abbr.Arith. processFirst-grade subj.Wing: Abbr.Postscript: Abbr.Building annex: Abbr.Something appended: Abbr.New wing, say: Abbr.Annex, briefly