Kind of puzzle (6)
I believe the answer is:
jigsaw
'kind of puzzle' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for jigsaw that I've seen before include "As pastime" , "Puzzle in which pieces must be reassembled" , "Puzzle fittingly completed" , "Sharp tool (for cutting puzzle into pieces?)" , "Kind of puzzle" .)