The most common and most likely answer to this crossword clue is the 9 plus 6 letter word STRETCHER BEARER
I've seen this crossword clue in Financial Times
S
T
R
E
T
C
H
E
R
B
E
A
R
E
R
More clues leading to the result STRETCHER BEARER
Buddy explains!
The straight part
We know that "employee to help carry the cases" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case employee to help carry the cases = stretcher bearer.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 STRETCHER BEARER mean?
STRETCHER BEARER noun- A person who carries, or helps to carry, injured or dead people on a stretcher.