A line dance? (5)

I believe the answer is:

conga

I believe this clue is a double definition.

'a line' is the first definition.
(conga line is a kind of line)

'dance?' is the second definition.
(conga is a kind of dance)

(Other definitions for conga that I've seen before include "Long-line dance" , "Party dance" , "wiggling line" , "Dance of 3 steps and a kick by people in single file" , "Latin American dance with three steps and a kick" .)

I've seen this clue in The Times.

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