The most common and most likely answer to this crossword clue is the 9 letter word PAINTINGS
I've seen this crossword clue in The Guardian
P
A
I
N
T
I
N
G
S
More clues leading to the result PAINTINGS
Buddy explains!
The straight part
We know that "17" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case 17 = paintings.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.
What does PAINTINGS mean?
PAINTINGS noun- An illustration or artwork done with the use of paint.
- The action of applying paint to a surface.
- The same activity as an art form.