The term 'sets down' can be broken down into five different crossword solutions: lays (4 letters), plunks (6 letters), ALIGHTS (7 letters), rests (5 letters), and puts (4 letters). To 'LAY' something is to PUT it down gently, usually in a horizontal position. To 'PLUNK' something is to drop it heavily and with a thud. To 'ALIGHT' is to descend from a higher place to a lower one, such as when a bird lands on a branch. To 'REST' is to stop moving and remain still. Finally, to 'PUT' something is to place it in a certain location.