οἱ ἐν τῇ ξυνωμοσίᾳ

From LSJ

τὸ τῶν γεωργῶν ὅσαι τε ἄλλαι τέχναι (Plato, Timaeus 17c10) → the class of farmers and other such crafts(men)

Source

Dutch (Woordenboekgrieks.nl)

de samenzweerders Thuc. 6.27.3 = οἱ ἐκ τῆς συνωμοσίας Plut. Ant. 13.4.