The most common and most likely answer to this crossword clue is the 8 letter word WAITRESS
I've seen this crossword clue in The Daily Telegraph
W
A
I
T
R
E
S
S
More clues leading to the result WAITRESS
- Swears it’s wrong for woman to give orders
- Server was down – engineer tries to get in
- Attendant with the very best lock
- Server tries to move round — was seen going outside
- She may serve ‘sir’ with a stew, carelessly
- Restaurant worker with perfect hair
- One offering ‘A stew, sir?’, taking order
- With Great North Road alongside part of Barnet one could get job in transport cafe
- Initials of web address I type return explicit site — some server!
- Water's spilled around Indian ship by a stewardess
Buddy explains!

The straight part
We know that "She may serve" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case she may serve = waitress.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 WAITRESS mean?
WAITRESS noun- A female attendant who serves customers in a restaurant, café, or similar.
- To work as a waitress.