The most common and most likely answer to this crossword clue is the 8 letter word TOILETRY
I've seen this crossword clue in The Times
T
O
I
L
E
T
R
Y
More clues leading to the result TOILETRY
- Material with which to test cosmetic
- John on track, getting cleaner
- I entered lottery, perhaps, winning bath salts?
- Writer coming up with score for soap, perhaps?
- Cosmetic blue, one to allow interiorly
- Used to clean litter you endlessly scattered
- Thin material put on crack is cosmetic, maybe
- Article perhaps used in washing cotton sample
- Labour over English tax for deodorant?
- Attempt to get hold of liquid, out-of-this-world bathroom item
Buddy explains!

The straight part
We know that "cosmetic" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cosmetic = toiletry.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 TOILETRY mean?
TOILETRY noun- Any item used for personal hygiene or grooming.