The most common and most likely answer to this crossword clue is the 9 letter word OBSCENITY
O
B
S
C
E
N
I
T
Y
Buddy explains!

The straight part
We know that "it’s crude" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case it’s crude = obscenity.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 OBSCENITY mean?
OBSCENITY noun- Something that is obscene.
- An act of obscene behaviour.
- Specifically, an offensive word; a profanity; a dirty word.
- The qualities that make something obscene; lewdness, indecency, or offensive behaviour.