The most common and most likely answer to this crossword clue is the 12 letter word SCRAPERBOARD
S
C
R
A
P
E
R
B
O
A
R
D
Buddy explains!
The straight part
We know that "scratchy artwork" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case scratchy artwork = scraperboard.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
Crossword Answer definitions
SCRAPERBOARD noun- Scratchboard