Soldiers dance (7)
I believe the answer is:
lancers
'soldiers'' is the definition.
(lancer is a kind of soldier)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for lancers that I've seen before include "Quadrille for eight/sixteen pairs" , "Soldiers with spears on horseback" , "Old regiment; dance" , "Cavalry soldiers; dance" , "Cavalrymen - dance" .)