ὁ λαγὼς τὸν περὶ τῶν κρεῶν δρόμον τρέχει → save one's bacon, save one's neck, save one's skin
P. and V. δεινός σοφός, συνετός, δριμύς (Plato and Euripides, Cyclops), Ar. and P. φρόνιμος, ὀξύς, P. ἀγχίνους; see sagacious.
clear: P. and V. σαφής; see also sharp.
of things: P. and V. σοφός, Ar. and P. φρόνιμος.