Picture puzzle (6)
(Other definitions for jigsaw that I've seen before include "Picture in pieces" , "Puzzle with pieces to assemble" , "As pastime" , "Puzzle - powered cutter" , "Puzzle-maker" .)
'picture puzzle' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rebus that I've seen before include "Enigmatic representation" , "Ian Rankin's Scottish detective" , "Word puzzle with pictures and letters" , "Pictorial word puzzle" , "Visual type of word puzzle" .)