The most common and most likely answer to this crossword clue is the 7 letter word COURIER
I've seen this crossword clue in Independent
C
O
U
R
I
E
R
More clues leading to the result COURIER
- Travel guide found by font
- Palace attendant has no time for messenger
- Palace attendant having no time for messenger
- Attendant lacks temperature guide
- Tour guide indicates font
- He travels to work
- Guide broadcast of person cooking spicy food
- Messenger in hall of justice endlessly? That is right
- Scientist right about old guide
- Guide wasting attendant’s time
Buddy explains!

The straight part
We know that "messenger" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case messenger = courier.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 COURIER mean?
COURIER noun- A person who looks after and guides tourists
- A person who delivers messages
- A company that delivers messages
- A company that transports goods
- A user who earns access to a topsite by uploading warez
- To deliver by courier.