Wild one's into dance movement (9)
I believe the answer is:
ballistic
'wild' is the definition.
(I've seen this in another clue)
'one's into dance movement' is the wordplay.
'one's' becomes 'i's' (Roman numeral).
'into' is an insertion indicator.
'dance' becomes 'ball' (ball is a kind of dance).
'movement' becomes 'tic' (involuntary bodily movement).
'ball'+'tic'='balltic'
'is' placed into 'balltic' is 'BALLISTIC'.
(Other definitions for ballistic that I've seen before include "Like missiles" , "Winsome deer" , "Moved by gravity" , "To do with the flight of projectiles - basic lilt (anag)" , "Projectile" .)