The most common and most likely answer to this crossword clue is the 11 letter word WAITRESSING
I've seen this crossword clue in The Guardian
W
A
I
T
R
E
S
S
I
N
G
More clues leading to the result WAITRESSING
Buddy explains!

The straight part
We know that "a job taking orders /a job taking orders" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a job taking orders /a job taking orders = waitressing.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 WAITRESSING mean?
WAITRESSING verb- To work as a waitress.