The most common and most likely answer to this crossword clue is the 9 letter word GARGOYLES
G
A
R
G
O
Y
L
E
S
Buddy explains!

The straight part
We know that "grotesqueries" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case grotesqueries = gargoyles.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 GARGOYLES mean?
GARGOYLES noun- A carved grotesque figure on a spout which conveys water away from the gutters.
- Any decorative carved grotesque figure on a building.
- A fictional winged monster.
- An ugly woman.