Dance beat to disappear (5)
I believe the answer is:
tango
'dance' is the definition.
(tangoing is a kind of dancing)
'beat to disappear' is the wordplay.
'beat' becomes 'tan' (I've seen this before).
'to disappear' becomes 'go' (going is a kind of disappearing).
'tan'+'go'='TANGO'
(Other definitions for tango that I've seen before include "T in radio alphabet" , "reputedly takes two" , "something seen in ballroom?" , "uniform to follow" , "Latin American dance takes two to do it" .)