Move with swagger (6)
'move with swagger' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for prance that I've seen before include "Move with high springy steps" , "Bound around" , "(Of horse) use high steps" , "Caper, swagger" , "(Of horse) move with high steps" .)
(Other definitions for strut that I've seen before include "Walk proudly; brace" , "Reinforcing rod" , "Walk proudly; bar" , "Swagger; bracing bar" , "Compression member; walk stiffly" .)