Lewis & Short

effector, ōris, m. [efficio], an effecter, producer, author (a Ciceronian word), Cic. Univ. 5 fin.; id. Div. 2, 26; id. de Or. 1, 33, 150 (quoted in Quint. 10, 3, 1; for which, perfector, Cic. de Or. 1, 60 fin.).