Source : WordNet®

clear up
     v 1: make clear and (more) comprehensible; "clarify the mystery
          surrounding her death" [syn: {clarify}, {elucidate}]
          [ant: {obfuscate}]
     2: finish a task completely; "I finally got through this
        homework assignment" [syn: {get through}, {wrap up}, {finish
        off}, {mop up}, {polish off}, {finish up}]
     3: free (the throat) by making a rasping sound; "Clear the
        throat" [syn: {clear}]
     4: become clear; "The sky cleared after the storm" [syn: {clear},
         {light up}, {brighten}] [ant: {overcast}]
     5: make free from confusion or ambiguity; make clear; "Could
        you clarify these remarks?"; "Clear up the question of who
        is at fault" [syn: {clear}, {shed light on}, {crystallize},
         {crystallise}, {crystalize}, {crystalise}, {straighten
        out}, {sort out}, {enlighten}, {illuminate}, {elucidate}]