Clearly on ice about the grade of this art style (10)
I believe the answer is:
neoclassic
'clearly on ice about the grade' is the definition.
I can't tell whether this defines the answer.
'of this art style' is the wordplay.
I cannot quite see how this works, but
'of' could be 'o' and 'o' is found in the answer.
'style' could be 'class' (I've seen this in another clue) and 'class' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for neoclassic that I've seen before include "Revivalist movement in art and architecture" , "form of art" , "In a style revived from the past" , "influenced by ancient architecture" .)