Ballet leap (9)
'ballet leap' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for entrechat that I've seen before include "Form of ballet jump" , "Ballet move" , "Ballet dancer's leap" , "Ballet movement" , "Leap in the air" .)
(Other definitions for jete that I've seen before include "Dance manoeuvre" , "movement" , "spring" , "Jump" .)