The most common and most likely answer to this crossword clue is the 10 letter word CRYPTOGRAM
I've seen this crossword clue in The Guardian
C
R
Y
P
T
O
G
R
A
M
More clues leading to the result CRYPTOGRAM
- Coded text in tomb upset woman
- Sob quietly to put on weight? One must be cracked
- Sob quietly in front of flipping French girl’s coded text
- Agent’s message, maybe: “Try to come back between chapel and drive”
- ‘Bout of weeping got pram fixed’ — could be a coded message?
- Keen on parking, to spread upturned treasure hunt, say
Buddy explains!
The straight part
We know that "Agent’s message" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case agent’s message = cryptogram.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 CRYPTOGRAM mean?
CRYPTOGRAM noun- Encrypted text.
- (games) A type of word puzzle in which text encoded by a simple cipher is to be decoded.