Act for every class, twirling cane (11)
I believe the answer is:
performance
'act' is the definition.
(performance is a kind of act)
'every class twirling cane' is the wordplay.
'every' becomes 'per' (I've seen this in other clues).
'class' becomes 'form class' (form class is a kind of class).
'twirling' indicates anagramming the letters.
'cane' anagrammed gives 'ance'.
'per'+'form'+'ance'='PERFORMANCE'
'for' acts as a link.
(Other definitions for performance that I've seen before include "Presentation" , "(Actor's) rendering of a role" , "Execution" , "Dramatic production" , "Rendition" .)