The most common and most likely answer to this crossword clue is the 6 letter word LEGATE
I've seen this crossword clue in The Guardian
L
E
G
A
T
E
More clues leading to the result LEGATE
- Diplomat taking stage with troublemaker
- Attendance money received by the French ambassador
- Ambassador’s attendance in support of the French
- Member had to be messenger for the Pope
- Scandal concerning the French envoy?
- Supporter downed emissary
- Emissary set to return having had meal
- Member got stuck into representative
- Member demolished old Roman governor
- Envoy, say, entering behind schedule
Buddy explains!

The straight part
We know that "envoy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case envoy = legate.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 LEGATE mean?
LEGATE noun- A deputy representing the pope, specifically a papal ambassador sent on special ecclesiastical missions.
- An ambassador or messenger.
- The deputy of a provincial governor or general in ancient Rome.
- To leave as a legacy.