Dance beat has energy (5)
I believe the answer is:
tango
'dance' is the definition.
(tangoing is a kind of dancing)
'beat has energy' is the wordplay.
'beat' becomes 'tan' (I've seen this before).
'has' means one lot of letters go next to another.
'energy' becomes 'go' (I've seen this in other clues).
'tan'+'go'='TANGO'
(Other definitions for tango that I've seen before include "Dance originating in Argentina" , "Steps" , "Ballroom dance (for two?)" , "tee" , "Dance; T (radio comms.)" .)