Puzzle understood after dance (6)
I believe the answer is:
jigsaw
'puzzle' is the definition.
(jigsaw puzzle is a kind of puzzle)
'understood after dance' is the wordplay.
'understood' becomes 'saw' ('see' can be a synonym of 'understand').
'after' is a charade indicator (letters next to each other).
'dance' becomes 'jig' (jig is a kind of dance**).
'saw' after 'jig' is 'JIGSAW'.
(Other definitions for jigsaw that I've seen before include "Picture in pieces" , "Puzzle - powered cutter" , "Woodcutter" , "As pastime" , "Puzzle fittingly completed" .)