The most common and most likely answer to this crossword clue is the 8 letter word CHARLADY
I've seen this crossword clue in The Guardian
C
H
A
R
L
A
D
Y
More clues leading to the result CHARLADY
- Cautious bringing in youth as cleaner
- Reluctant to house youngster? Here’s one who does
- Reluctant to house youngster who could be cleaner
- Tea boy with yen for older female worker?
- Cleaner circumspect about boy
- Boy captivated by shy cleaner
- Circumspect about youth becoming a cleaner
- Cleaner youth gets accepted by showing caution
- Cleaner is cautious when boy interrupts
- Housekeeper moulded hard clay
Buddy explains!

The straight part
We know that "one who does" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one who does = charlady.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 CHARLADY mean?
CHARLADY noun- A woman who cleans houses and offices as an occupation.