Be heard to run an old-time dance (5)

I believe the answer is:

galop

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'dance' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

(Other definitions for galop that I've seen before include "Couple dance" , "Nineteenth-century dance" , "dance music" , "Lively ballroom dance" .)

I've seen this clue in the Evening Standard.

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