Possible Clues:

• Single stage during dance
• Dance performed by Armstrong?
• Vigorous foxtrot in duple time
• Dance that was enough for Newman?
• Husband's taken off decent record for the dance
• The little dears turn up for the dance after 21 across
• Vigorous dance
• Go apace with the ball?
• Minimalist dance?
• Somebody's sweetheart getting up for a dance