Presentation for each class with master introducing Newton (11)
I believe the answer is:
performance
'presentation' is the definition.
(performance is a kind of presentation)
'each class with master introducing newton' is the wordplay.
'each' becomes 'per' ('per' can mean for each).
'class with' becomes 'form' (form class is a kind of class. I am not sure about the 'with' bit.).
'master' becomes 'ace' (both can mean an expert).
'introducing' indicates putting letters inside (some letters introduced or inserted into others).
'newton' becomes 'N' (symbol for the scientific unit of force).
'ace' enclosing 'n' is 'ance'.
'per'+'form'+'ance'='PERFORMANCE'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for performance that I've seen before include "(Actor's) rendering of a role" , "Execution" , "Stage show" , "Presentation" , "What actor gives in role" .)