1) American musical duo 2) Apprehender 3) Electronic music duo 4) Human 5) Individual 6) Informed fellow 7) Informed one 8) Mortal 9) One who apprehends 10) One with answers 11) Person 12) Savvy one 13) Somebody 14) Someone 15) Soul Found on https://www.crosswordclues.com/clue/knower