As a work of art, would be said to be incisive (7)
I believe the answer is:
woodcut
'as a work of art' is the definition.
I can't judge whether this definition defines the answer.
'would be said to be incisive' is the wordplay.
'be said to be' shows a homophone (sound like).
'incisive' becomes 'cut' (I can't explain this - if you can you should believe this answer much more).
'would' sounds like 'wood'.
'wood'+'cut'='WOODCUT'
Can you help me to learn more?
(Other definitions for woodcut that I've seen before include "Engraving" , "Relief work" , "Printing block" , "(Print from) incised block" , "Print made from an engraved block" .)