Dancing and moving behind beat (8)
I believe the answer is:
tangoing
'dancing' is the definition.
(tangoing is a kind of dancing)
'moving behind beat' is the wordplay.
'moving' becomes 'going' ('go' can be a synonym of 'move').
'behind' is a charade indicator (letters next to each other).
'beat' becomes 'tan' (I've seen this before).
'going' after 'tan' is 'TANGOING'.
'and' acts as a link.
(Other definitions for tangoing that I've seen before include "Dancing" , "what obsessive sunbather dreads?" , "Taking steps" .)