Group of dancers refrain, joining queue (6,4)

I believe the answer is:

chorus line

'group of dancers' is the definition.

'refrain joining queue' is the wordplay.
'refrain' becomes 'chorus' ('chorus' can be a synonym of 'refrain').
'joining' is a charade indicator (letters next to each other).
'queue' becomes 'line' (I've seen this before).
'chorus'+'line'='CHORUS LINE'

(Another definition for chorus line that I've seen is " cabaret".)

I've seen this clue in The Telegraph.

Want a hint initially instead of a full solution? Install my app