The most common and most likely answer to this crossword clue is the 8 letter word ATOMISER
I've seen this crossword clue in The Guardian
A
T
O
M
I
S
E
R
More clues leading to the result ATOMISER
- What might produce ‘aero-mist’ fancifully?
- Action regularly taken by one who’s near spray
- Storm in Timor Sea that generates spray
- Mister Satie more imperfectly played
- A cat is visiting queen to spray!
- A moister ground arises from spray
- Is Her Majesty after a cat spray?
- It makes things fine for old Scrooge
- Spray from a cat is here inside
- It’s a more flourishing spray
Buddy explains!

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 ATOMISER mean?
ATOMISER noun- An instrument for reducing a liquid to spray or vapor for disinfecting, cooling, medical use or perfume spraying.