Dance beat gets green light (5)
I believe the answer is:
tango
'dance' is the definition.
(tangoing is a kind of dancing)
'beat gets green light' is the wordplay.
'beat' becomes 'tan' (I've seen this before).
'gets' means one lot of letters go next to another.
'green light' becomes 'go' (I've seen this in other clues).
'tan'+'go'='TANGO'
(Other definitions for tango that I've seen before include "Tonga (anag.)" , "Dance originally from Buenos Aires" , "reputedly takes two" , "Last - in Paris (film)" , "Latin American dance (requiring two?)" .)