What does the cryptic crossword clue "Diplomat joining emirs, say, having made right move (8)" mean?

The definition is "Diplomat". The wordplay uses an anagram. anagram of EMIRS, + SAY, = EMISSARY; definition: "Diplomat" The answer is EMISSARY.

Diplomat joining emirs, say, having made right move (8)

Times Cryptic #28644 | 4 Down | 2023-07-01 flower