COTD: Some medieval idolatry is rational (5)

day 17 of an experiment in which i press the "random word" button on onelook and make a cryptic clue out of it. (bit simple but i think this was the best approach)

day 16, day 15

day 14, day 13, day 12, day 11, day 10, day 9, day 8

day 7, day 6, day 5, day 4, day 3, day 2, day 1