What does the cryptic crossword clue "Old Democrat organised procession for head of state? (9)" mean?

The definition is "procession for head of state". The wordplay uses an anagram. anagram of O DEMOCRAT = MOTORCADE The answer is MOTORCADE.

Old Democrat organised procession for head of state? (9)

Times Cryptic #28815 | 6 Down | 2024-01-17 flower