The most common and most likely answer to this crossword clue is the 10 letter word TOILETRIES
I've seen this crossword clue in The Guardian
T
O
I
L
E
T
R
I
E
S
Buddy explains!
The straight part
We know that "found in the bathroom" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case found in the bathroom = toiletries.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 TOILETRIES mean?
TOILETRIES noun- Any item used for personal hygiene or grooming.