Maybe music class getting answer right at first (3,4)
I believe the answer is:
art form
'maybe music' is the definition.
(I know that music genre is a type of art form)
'class getting answer right at first' is the wordplay.
'class' becomes 'form' (form class is a kind of class).
'getting' indicates putting letters inside.
'right' indicates one should take the final letters (the letter on the right of the word).
'first' is a charade indicator (letters next to each other).
The final letter of 'answer' is 'r'.
'r' placed within 'at' is 'art'.
'form' after 'art' is 'ART FORM'.
(Other definitions for art form that I've seen before include "novel!" , "Creative genre" , "Writing or painting, for example" , "Music possibly" , "Traditional medium of creative expression" .)